What is part part whole in big ideas math?

Math Overview The part-part-whole relationship is very important in developing number sense and beginning addition concepts. In this section, students identify the whole and the parts that make up the whole for numbers to 5 . Students conceptually subitize when they see two smaller groups within a group.

What order should I teach addition strategies?

Addition Strategies Beginning Strategies. Students begin their understanding of addition by modeling out the actions in a joining situation. ... Counting Up & Counting On. ... Number Grids. ... Doubles & Near Doubles. ... Open Number Line. ... Compensation. ... Making "Friendly" Numbers. ... Partial Sums. More items...

What is the strategy of addition?

Counting Up & Counting On For example, when adding three plus two, they would say "one, two, three... four, five". The Counting On strategy is when students hold on to one number and continue counting on the number added. For example, when doing the same problem, adding three plus two, the student would say "three...

What are teaching strategies for grade 1?

How to Teach First Grade – Tips Beyond the First Day Create a Numerical System. Take your alphabetical student list and assign each student a number. ... Use Visual Timers. ... Make Use of Rewards. ... Avoid Treating Them Like Babies. ... Make Math Routine. ... Limit Activities to 12-18 Minutes. ... Integrate Plenty of Movement Breaks. Jan 4, 2024

What is the standard addition strategy?

Standardization strategies are initiatives that brands adapt to make their marketing approaches similar globally . Most standardization techniques are applied to branding, costs, and production. They will result in companies having similar brands globally, reducing product costs, and improving production techniques.

What is the making 10 addition strategy?

The “Making 10” strategy is one method that makes adding larger numbers easier. The “Making 10” strategy is when you try to turn one of the numbers in an addition problem into 10 . The first example demonstrates this strategy.

Go Math Grade 1 Chapter 3 Answer Key Pdf Addition Strategies (2024)

Go Math Grade 1 Chapter 3 Answer Key Pdf: Students of First Grade can keep a track of their preparation level using the Go Math Grade 1 Answer Key Chapter 3 Addition Strategies. By Solving Problems from the Go Math Grade 1 Ch 3 Answers you can enhance your fundamentals both at Chapter Level and Lesson Level. The HMH Go Math Grade 1 Answer Key Chapter 3 Addition Strategies covers questions belonging to Lessons, Assessments, Homework & Practice, Review Tests, etc. You can download the First Grade Go Math Chapter 3 Answer Key and access the preparation material no matter whichever corner you are preparing.

Addition Strategies Go Math Grade 1 Chapter 3 Answer Key Pdf

To become proficient in the Concepts of Go Math Grade 1 Chapter 3 Addition Strategies all you need to do is be thorough with the concepts and solve the various questions from it. Access the Topicwise HMH Go Math Grade 1 Ch 3 Addition Strategies Solution Key by simply clicking on the direct links available. Enhance your conceptual knowledge taking the help of these quick resources and become a pro in the subject.

Addition Strategies

Addition Strategies Show What You Know – Page 128
Addition Strategies Vocabulary Builder – Page 129
Addition Strategies Game: Ducky Sums – Page 130
Addition Strategies Vocabulary Game – Page(130A-130B)

Lesson: 1 Algebra • Add in Any Order

Lesson 3.1 Algebra • Add in Any Order – Page(131-136)

Lesson: 2 Count On

Lesson 3.2 Count On – Page(137-142)

Lesson: 3 Add Doubles

Lesson 3.3 Add Doubles – Page(143-148)

Lesson: 4 Use Doubles to Add

Lesson 3.4 Use Doubles to Add -Page(149-154)

Lesson: 5 Doubles Plus 1 and Doubles Minus 1

Lesson 3.5 Doubles Plus 1 and Doubles Minus 1 – Page(155-160)

Lesson: 6 Practice the Strategies

Lesson 3.6 Practice the Strategies – Page(161-166)

Mid-Chapter Checkpoint

Addition Strategies Mid-Chapter Checkpoint – Page 164

Lesson: 7 Add 10 and More

Lesson 3.7 Add 10 and More – Page(167-172)

Lesson: 8 Make a 10 to Add

Lesson 3.8 Make a 10 to Add – Page(173-178)

Lesson: 9 Use Make a 10 to Add

Lesson 3.9 Use Make a 10 to Add – Page(179-184)

Lesson: 10 Algebra • Add 3 Numbers

Lesson 3.10 Algebra • Add 3 Numbers – Page(185-190)

Lesson: 11 Algebra • Add 3 Numbers

Lesson 3.11 Algebra • Add 3 Numbers – Page(191-196)

Lesson: 12 Problem Solving • Use Addition Strategies

Lesson 3.12 Problem Solving • Use Addition Strategies – Page(197-202)
Addition Strategies Chapter 3 Review/Test – Page(203-206)

Curious George

There are 4 fish in the tank. If you doubled the number of fish, how many would there be?

Addition Strategies Show What You Know

Model Addition

Use to show each number. Draw the cubes. Write how many in all.

Question 1.

Answer:

2 + 3 = 5

+ =

Therefore, there are 5 in total

Use Symbols to Add
Use the picture. Write the addition sentence.

Question 2.

Answer: 2 + 4 = 6

Explanation:

The number of red bugs = 2

The number of green bugs = 4

Total : 2 + 4 = 6

Therefore, the total number of bug pictures are 6.

Question 3.

Answer: 4

Explanation:

The number of purple butterflies = 3

The number of orange butterflies = 1

Total butterflies : 3 + 1 = 4

Therefore, there are 4 butterflies

Add in Any Order

Use and to add. Color to match. Write each sum.

Question 4.

1 + 4 = __

Answer:

+ =

Total : 1 + 4 = 5

Question 5.

4 + 1 = ___

Answer:

+ =

Total : 4 + 1 = 5

Addition Strategies Vocabulary Builder

Visualize It
Write the addends and the sum for the addition sentence

Answer:

Understand Vocabulary
Use a review word to complete the sentence.

Question 1.
4 and 3 in 4 + 3 = 7 are ___

Answer:

In 4 + 3 = 7 , 4 and 3 are addends.

Question 2.
4 + 3 = 7 is an ___

Answer:

4 + 3 = 7 is an Addition sentence.

Question 3.
4 cubes and 3 cubes are put together to __ the groups.

Answer:

4 cubes and 3 cubes are put together to 7 the groups.

Addition Strategies Game: Ducky Sums

Ducky Sums

Materials

Play with a partner.
1. Put your on START.
2. Toss the . Move your that number of spaces.
3. Use a a , and a to make the spinner. Spin.
4. Add the number you spin and the number your is on. Your partner checks the sum.
5. Take turns. The winner is the first person to get to END.

Addition Strategies Vocabulary Game

Going Places with GOMATH! words

Concentration

Materials
2 sets of word cards
How to Play
Play with a partner.

Mix the cards. Put the cards in rows blank side up.
Turn over two cards.
- If the words match, keep the pair of cards.
- If the words do not match, turn the cards blank side up again.
The other player takes a turn.
Find all the pairs. The player with more pairs wins.

The Write Way

Reflect
Choose one idea. Draw and write about it.
• Mary writes the addition sentence 4 + 5.
Rose writes the addition sentence 5 + 4.
Will they get the same answer? Tell how you know.
• Think about the ways you learned to add. Tell about your favorite way to add. Explain why.

Lesson 3.1 Algebra • Add in Any Order

Essential Question
What happens if you change the order of the addends when you add?

Listen and Draw

Use and . Color to model the problem. Write the addition sentence.

Answer:
Addition sentence :
7 + 8 = 15

= 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Use and . Color to change the order. Write the addition sentence.

Answer:
Addition sentence ( changing the order ) :
8 + 7 = 15

+ =

= 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Math Talk
MATHEMATICAL PRACTICES

Describe how knowing the fact 7 + 8 helps you find 8 + 7.

Model and Draw

Answer:
5 + 6 = 11
Fact : Even after changing the order of addends , the sum is same .

Share and Show MATH BOARD

Add. Change the order of the addends. Add again.

Question 1.

Answer:
8 + 9 = 17
Addition sentence after changing the order of addends =
9 + 8 = 17

Go Math Workbook Grade 1 Topic 3 Lesson 3.1 Answer Key Question 2.

Answer:
6 + 7 = 1 3
Addition sentence after changing the order of addends =
7 + 6 = 13

Question 3.

Answer:
7 + 5 = 12
Addition sentence after changing the order of addends =
5 + 7 = 12

Question 4.

Answer:
2 + 8 = 10
Addition sentence after changing the order of addends =
8 + 2 = 10

Question 5.

Answer:
9 + 2 = 11
Addition sentence after changing the order of addends =
2 + 9 = 11

Question 6.

Answer:
8 + 4 = 12
Addition sentence after changing the order of addends =
4 + 8 = 12

On Your Own

MATHEMATICAL PRACTICE
Attend to Precision Add. Change the order of the addends. Add again.

Question 7.

Answer:
9 + 6 = 15
Addition sentence after changing the order of addends =
6 + 9 = 15

Question 8.

Answer: 0 + 6 = 6
Addition sentence after changing the order of addends =
6 + 0 = 6

Question 9.

Answer:
8 + 3 = 11
Addition sentence after changing the order of addends =
3 + 8 = 11

Question 10.

Answer:
5 + 9 = 14
Addition sentence after changing the order of addends =
9 + 5 = 14

Question 11.

Answer:
4 +5 = 9
Addition sentence after changing the order of addends =
5 + 4 = 9

Question 12.

Answer:
8 + 5 = 13
Addition sentence after changing the order of addends =
5 + 8 = 13

Question 13.
THINK SMARTER
Nina uses the number sentence 3 + 7 = 10 to tell about her toy trucks. What other number sentence could Nina write to tell about her trucks using the same addends?
__ = __ + __

Answer:
Given,
Addition sentence : 3 + 7 = 10
Other Addition sentence : 10 = 7 + 3

Question 14.
GO DEEPER
Explain If Adam knows 4 + 7 = 11, what other addition fact does he know? Write the new fact in the box. Tell how Adam knows the new fact.

________________________
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
________________________

Answer:
Given ,
Addition sentence = 4 + 7 = 11
Other addition fact : 7 + 5 = 11

Problem Solving • Applications WRITE Math

Write two additional sentences you can use to solve the problem. Write the answer.

Question 15.
Roy sees 4 big fish and 9 small fish. How many fish does Roy see?
__ fish
__ + __ = __
__ + __ = __

Answer: 13

Explanation:
Given,
Number of big fishes = 4
Number of small fishes = 9
Total number of fishes = 4 + 9 = 13
Therefore, Roy sees 13 fishes
Addition sentences:
4 + 9 = 1 3
9 + 3 = 13

Question 16.
THINK SMARTER
Justin has 6 toys. He gets 8 more toys. How many toys does he have now?
__ toys
__ + __ = __
__ + __ = __

Answer: 14

Explanation:
Given,
Justin has 6 toys.
Number of toys he gets more = 8
Total : 6 + 8 = 14
Therefore, the total number of toys = 14
Addition sentences:
6 + 8 = 14
8 + 6 = 14

Question 17.
THINK SMARTER
Anna has two groups of pennies. She has 10 pennies in all. When she changes the order of the addends, the addition sentence is the same. What sentence can Anna write?

__ = __ + __

Answer: 5 + 5 = 10

Explanation :
Given,
Anna has 2 groups of pennies and also total number of pennies = 10
The addition sentence can be written with same addends as
5 + 5 = 10

Question 18.
THINK SMARTER
Write the addends in a different order.
3 + 4 = 7
__ + __ = 7

Answer:
4 + 3 = 7

TAKE HOME ACTIVITY
• Ask your child to explain what happens to the sum when you change the order of the addends.

Algebra • Add in Any Order Homework & Practice 3.1

Add. Change the order of the addends. Add again.

Question 1.

Answer:
7 + 3 =10
3 + 7 = 10

Question 2.

Answer:
4 + 7 = 11
7 + 4 = 11

Question 3.

Answer:
9 + 8 = 17
8 + 9 = 17

Problem Solving

Write two additional sentences you can use to solve the problem.

Question 4.
Camila has 5 shells. Then she finds 4 more shells. How many shells does she have now?
__ + __ = __
__ + __ = __

Answer: 9

Explanation :
Given that,
The number of shells Camila have = 5
The number of shells she finds more = 4
Total: 5+4= 9
Therefore, the number of shells she have now = 9
Addition sentences :
5 + 4 = 9
4 + 5 = 9

Question 5.
WRITE Math
Use pictures or words to explain how you would use the sum of 13 to show how to add in any order.

13 can be shown as the sum of 6 and 7
6 + 7 = 13

Lesson Check

Question 1.
What is another way to write 7 + 6 = 13?
6 + 7 = __

Answer: 6 + 7 = 13

Grade 1 Go Math Chapter 3 Lesson 1 Answer Key Question 2.
What is another way to write 6 + 8 = 14?
8 + 6 = __

Answer: 8 + 6 = 14

Spiral Review

Question 3.
What is the sum? Write the number.

Answer: 4 + 3 = 7

Question 4.
How many nests are there? Write the number.
2 nests and 1 more nest __ nests

Answer: 3

Explanation : 2 + 1 = 3
Therefore, the total number of nests = 3

Lesson 3.2 Count On

Essential Question
How do you count on 1, 2, or 3?

Listen

Start at 9. How can you count on to add? Add 1.

Add 1. 9 + 1 =10
Add 2. 9 + 2 = 11
Add 3. 9 + 3 = 12

Math Talk
MATHEMATICAL PRACTICES
Analyze How is counting on 2 like adding 2?

Share and Show MATH BOARD

Circle the greater addend. Draw to count on 1, 2, or 3. Write the sum.

Question 1.

Answer:
Greater addend : 6
6 + 2 = 8

Question 2.

6 + 3 = __

Answer:
Greater addend : 6
6 + 3 = 9

Go Math Grade 1 Chapter 3 Lesson 3.2 Answer Key Question 3.

__ = 1 + 6

Answer:
Greater addend = 6
6 + 1 = 7

Question 4.

__ = 7 + 1

Answer:
Greater addend : 7
7 + 1 = 8

Question 5.

2 + 7 = __

Answer:
Greater addend = 7
7 + 2 = 9

Question 6.

__ = 7 + 3

Answer:
Greater addend : 7
7 + 3 = 10

On Your Own

MATHEMATICAL PRACTICE
Circle the greater addend. Count on to find the sum.

Question 7.

Answer:
Greater addend : 9
1 + 9 = 10

Question 8.

Answer:
Greater addend : 8
3 + 8 = 11

Question 9.

Answer:
Greater addend : 8
1 + 8 = 9

Question 10.

Answer:
Greater addend : 6
1 + 6 = 7

Question 11.

Answer :
Greater addend : 9
9 + 3 =12

Question 12.

Answer:
Greater addend : 7
7 + 2 = 9

Question 13.

Answer:
Greater addend : 6
2 + 6 = 8

Question 14.

Answer:
Greater addend : 5 + 3 = 8

Question 15.

Answer:
Greater addend : 7
7 + 1 = 8

Question 16.

Answer:
Greater addend = 7
3 + 7 =10

Question 17.

Answer:
Greater addend : 9
9 + 2 = 11

Question 18.

Answer:
Greater addend : 4
3 + 4 = 7

Question 19.
GO DEEPER
Adam has 6 hats. Molly has 3 hats. They stack all their hats. Then Blake puts 2 more hats on the stack. How many hats are on the stack?
__ + __ = ___ hats
__ + __ = ___ hats

Answer:
6 + 3 = 9
9 + 2 = 11

Question 20.
MATHEMATICAL PRACTICE
Explain Terry added 3 and 7. He got a sum of 9. His answer is not correct. Describe how Terry can find the correct sum.
_______________
_ _ _ _ _ _ _ _ _ _ _
_______________
_______________
_ _ _ _ _ _ _ _ _ _ _
_______________

Answer:
No, he is wrong.
The sum of 3 and 7 is 10
Addition sentence : 3 + 7 = 10
Starts at 7 and counts by 3, means 8, 9, 10
So, the answer is 0.

Problem Solving • Applications WRITE Math

Draw to solve. Write the addition sentence.

Question 21.
THINK SMARTER
Cindy and Joe pick 8 oranges. Then they pick 3 more oranges. How many oranges do they pick?
__ + __ = ___ oranges

Answer: 11

Explanation :
Given that,
The number of oranges Cindy and Joe pick = 8
The number of more oranges they pick = 3
Total : 8 + 3 = 11 oranges
Therefore, the number of total oranges = 11

________________________________________________________________________________________________________

1 2 3 4 5 6 7 8 9 10 11

Which three numbers can you use to complete the problem?

Question 22.
THINK SMARTER
Jennifer has __ stamps. She gets __ more stamps. How many stamps does she have now?
__ + __ = __ stamps

Answer: 10

Explanation :
Jennifer has 7 stamps
Number of more stamps = 3
Addition sentence :
7 + 3 = 10

Question 23.
THINK SMARTER
Count on from 3. Write the number that shows 2 more in the box below

Answer: 5

TAKE HOME ACTIVITY
• Have your child tell you how to count on to find the sum for 6 + 3.

Count On Homework & Practice 3.2

Circle the greater addend. Count on to find the sum.

Question 1.

Answer:
Greater addend : 8
8 + 2 = 10

Question 2.

Answer:
Greater addend : 7
1 + 7 = 8

Question 3.

Answer:
Greater addend : 9
3 + 9 = 12

Question 4.

Answer:
Greater addend : 5
5 + 3 = 8

Problem Solving

Draw to solve. Write the addition sentence.

Go Math 1 Circle The Greater Addend Count on to Find the Sum Question 5.
Jon eats 6 crackers. Then he eats 3 more crackers. How many crackers does he eat?
__ + __ = __ crackers

Answer: 9

Explanation :
Number of crackers Jon eat = 6
Number of crackers he ate more = 3
Total : 6 + 3 = 9 Crackers
Therefore, Jon ate 9 crackers .

Question 6.
WRITE Math
Use pictures or words to explain how you can find 9 + 3 by counting on.

Answer:
9 + 3 = 12

+ =

1 2 3 4 5 6 7 8 9 10 11 12

Lesson Check

Question 1.
Count on to solve 5 + 2. Write the sum
__

Answer:
5 + 2 = 7

Question 2.
Count on to solve 1 + 9. Write the sum.
__

Answer:
1 + 9 = 10

Spiral Review

Question 3.
What does the model show?
__ + __ = ___

Answer:
3 + 3 = 6

+ =

Question 4.
4 ducks swim in the pond. 2 more ducks join them. How many ducks are in the pond now? Complete the model and the number sentence.

4 + 2 = __

Answer:
4 + 2 = 6

Lesson 3.3 Add Doubles

Essential Question
What are doubles facts?

Listen and Draw

Use . Draw to solve. Write the addition sentence.

__ + __ = __

Answer: 2 + 2 = 4

+ =

Math Talk
MATHEMATICAL PRACTICES
Use Tools Describe how your model shows a doubles fact.

Model and Draw

Why are these double facts?

Answer: Answer:

1 + 1 = 2 2 + 2 = 4

+ = + =

Share and Show MATH BOARD

Use . Draw to show your work. Write the sum.

Question 1.

Answer:
3 + 3 = 6

_____________________________

Go Math Grade 1 Lesson 3.3 Answer Key Question 2.

Answer: 4 + 4 = 8

___________________________

Question 3.

Answer: 5 + 5 = 10

_______________________________________________

Question 4.

Answer: 6 + 6 = 12

____________________________________________________________________________

On Your Own

GO DEEPER
Use . Draw to show your work. Write the sum.

Question 5.

Answer: 7 + 7 = 14

Add Doubles Homework & Practice 3.3

Use . Draw to show your work. Write the sum.

Question 1.

Answer: 4 + 4 = 8

+ =

Question 2.

Answer: 6 + 6 = 12

+ =

Question 3.

Answer: 3 + 3 = 6

+ =

Question 4.

Answer: 8 + 8 = 16

+ =

Problem Solving

Write a doubles fact to solve.

Go Math Grade 1 Pdf Lesson 3.3 Eat It or Toss It Answer Key Question 5.
There are 16 crayons in the box. Some are green and some are red. The number of green crayons is the same as the number of red crayons.
__ = __ + __

Answer: 16 = 8 + 8

Explanation:

Given ,
The total number of crayons in the box = 16
Also give, the number of green crayons is the same as the number of red crayons.
Now, By using doubles fact we can write number sentence as:
8 + 8 = 16

Question 6.
WRITE Math
Use pictures or words to explain how you could find the sum of 7 + 7.

Answer:
7 + 7 = 14

+ =

Lesson Check

Question 1.
Write a doubles fact with the sum of 18.
__ + __ = 18

Answer:
A doubles fact with the sum of 18 =
9 + 9 = 18

Question 2.
Write a doubles fact with the sum of 12.
__ + __ = 12

Answer:
A doubles fact with the sum of 12 =
6 + 6 = 12

Spiral Review

Question 3.
What is the sum of 3 and 2? Draw the . Write the sum.
__+ __ = __

Answer: 5

Explanation:
The sum of 3 and 2 is 5
Number sentence :
3 + 2 = 5

+ =

Question 4.
Draw circles to show the numbers. Write the sum.
__ + __ = __

Answer:

Lesson 3.4 Use Doubles to Add

Essential Question
How can you use doubles to help you add?

Listen and Draw

Draw to show the problem. Write the number of fish.

There are __ fish.

Math Talk
MATHEMATICAL PRACTICES

Look for Structure How does knowing 3 + 3 help you solve the problem?

Model and Draw

How can a doubles fact help you solve 6 + 7?

So, 6 + 7 = __

Answer:
6 + 7 = 13
By using doubles fact ,
13 can be shown as 6 + 6 + 1 = 13

Share and Show MATH BOARD

Use to model. Make doubles. Add.

Question 1.

Answer :
9 + 8 = 17
8 + 8 + 1 = 17
So, 9 + 8 = 17

Question 2.

Answer:
5 + 5 + 1 = 11
So, 5 + 6 = 11

On Your Own

MATHEMATICAL PRACTICE
Use a Concrete Model
Use . Make doubles. Add.

Question 3.

Answer:
7 + 8 = 15
By using doubles fact ,
7 + 7 + 1 = 15

Question 4.

Answer :
5 + 4 = 9
By using doubles fact ,
4 + 4 + 1 = 9

Question 5.
THINK SMARTER
Mandy has the same number of red and yellow leaves. Then she finds one more yellow leaf. There are 17 leaves in all. How many leaves are red? How many leaves are yellow?
__ red leaves __ yellow leaves

Answer : 17

Explanation :
Given , the total number of leaves = 17
Also given , Mandy has the same number of red and yellow leaves
And also find another yellow flower
By using doubles plus one effect , we can show addition sentence as :
8 + 8 + 1 = 17
Therefore,
Number of red flowers = 8
Number of yellow flowers = 9.

GO DEEPER
Explain Would you use count on or doubles to solve? Why?

Question 6.
3 + 4

Answer: 3 + 3 + 1 = 7
Doubles plus one fact.

Question 7.
3 + 9

Answer :
9 and count on 3

Problem Solving • Applications

Question 8.
THINK SMARTER
Use what you know about doubles to complete the Key. Write the missing sums.

Answer :

Question 9.
THINK SMARTER
There are 7 red cubes. There are 8 yellow cubes. How many cubes are there in all? Use a double to add. Write the missing numbers.

Answer: 15

Explanation:
The number of red cubes = 7
The number of yellow cubes = 8
Total : 7 + 8 = 15
Number sentence with double fact = 7 + 7+ 1 = 15
So, 7 + 8 = 15

TAKE HOME ACTIVITY
• Ask your child to show you how to use what he or she knows about doubles to help solve 6 + 5.

Use Doubles to Add Homework & Practice 3.4

Use . Make doubles. Add.

Question 1.

Answer:
5 + 6 = 11
The number sentence with doubles fact =
5 + 5 + 1 = 11

Go Math 1st Grade Chapter 3 Test Algebra Add 3 Addends Lesson 3.4 Question 2.

So, 9 + 8 = __

Answer:
9 + 8 = 17
The number sentence with doubles fact =
8 + 8 + 1 = 17

Use doubles to help you add.

Question 3.
8 + 7 = __
Answer: Doubles plus one fact.

Explanation :
8 + 7 = 15
The number sentence with doubles fact :
7 + 7 + 1 = 15

Question 4.
6 + 5 = __

Answer: Doubles plus one fact.

Explanation :
6 + 5 = 11
The number sentence with doubles plus one fact :
5 + 5 + 1 = 11

Question 5.
7 + 6 = __

Answer: Doubles plus one fact .

Explanation :
7 + 6 = 13
The number sentence with doubles plus one fact :
6 + 6 + 1 = 13

Problem Solving

Solve. Draw or write to explain.

Go Math 1st Grade Lesson 1 Homework 3.4 Question 6.
Bo has 6 toys. Mia has 7 toys. How many toys do they have?
__ toys

Answer: 13

Explanation:
The number of toys Bo have = 6
The number of toys Mia have = 7
Total : 6 +7 = 13
Therefore, the total number of toys they both have = 13

Question 7.
WRITE Math
Draw and label a picture to show how knowing 7 + 7 helps you find 7 + 8.

Lesson Check

Question 1.
Use doubles to find the sum of 7 + 8. Write the number sentence.
__ + __ + __ = __
Answer:
The sum of 7 + 8 = 15
The number sentence with doubles plus one fact :
7 + 7 + 1 = 15

Spiral Review

Question 2.
Circle the part you take from the group. Cross it out. Then write the difference.

8 – 6 = __

Answer:
8 – 6 = 2

Question 3.
There are 7 gray kittens. 2 kittens are black. How many fewer black kittens are there than gray kittens?
Use the bar model to solve. Then write the number sentence.

__ – __ = __

Answer:
7 – 2 = 5
Therefore, there are 5 fewer black kittens are there than gray kittens.

Lesson 3.5 Doubles Plus 1 and Doubles Minus 1

Essential Question
How can you use what you know about doubles to find other sums?

Listen and Draw

How can you use the doubles fact, 4 + 4, to solve each problem? Draw to show how. Complete the addition sentence.

Answer :

4 + 4 + 1 = 9 – Doubles plus one fact
4 + 4 – 1 = 7 – Doubles minus one fact.

Math Talk
MATHEMATICAL PRACTICES

Explain what happens to the doubles fact when you increase one addend by one or decrease one addend by one.

Share and Show MATH BOARD

Use to add. Solve the doubles fact. Then use doubles plus one or doubles minus one. Circle + or − to show how you solved each one.

Question 1.

Answer:
2 + 2 = 4
2+ 2+ 1 = 5 doubles plus one
2 + 2 – 1 = 3 – doubles minus one.

Question 2.

Answer :
3 + 3 = 6
3 + 3 + 1 = 7 – Doubles plus one
3 + 3 – 1 = 5 – Doubles minus one

Question 3.

Answer :
4 + 4 = 8
4 + 4 + 1 = 9 – Doubles plus one
4 + 4 – 1 = 7 – Doubles minus one

On Your Own

MATHEMATICAL PRACTICE
Make Connections Add. Write the doubles fact you used to solve the problem.

Question 4.
8 + 9 = __

Answer:
Doubles plus one fact .

Explanation :
8 + 9 = 17
The number sentence with doubles plus one fact :
8 + 8 + 1 = 17

Question 5.
2 + 3 = __

Answer:
Doubles plus one fact .
Explanation :
2 + 3 = 5
The number sentence with doubles plus one fact :
2 + 2 + 1 = 5

Question 6.
7 + 6 = __

Answer:
Doubles plus one fact .

Explanation :
7 + 6 = 13
The number sentence with doubles plus one fact :
6 + 6 + 1 = 15

Question 7.
6 + 5 = __

Answer:
Doubles plus one fact .

Explanation :
6 + 5 = 11
The number sentence with doubles plus one fact :
5 + 5 + 1 = 15

Question 8.
3 + 4 = __

Answer:
Doubles plus one fact .

Explanation :
3 + 4 = 7
The number sentence with doubles plus one fact :
3 + 3 + 1 = 7

Go Math Grade 1 Chapter 3 Answer Key Question 9.
4 + 5 = __

Answer:
Doubles plus one fact .

Explanation :
4 + 5 = 9
The number sentence with doubles plus one fact :
4 + 4 + 1 = 15

Question 10.
THINK SMARTER
Brianna has 6 toy ducks. Ian has the same number of toy ducks and a toy fish. How many toys do Brianna and Ian have?

Answer : 13

Explanation :
The number of toy ducks Brianna

THINK SMARTER
Add. Write the doubles plus one fact. Write the doubles minus one fact.

Question 11.

Answer :
6 + 6 = 12
6 + 6 + 1 = 1 3
6 + 6 – 1 = 11

Problem Solving • Applications

Question 12.
GO DEEPER
Grace wants to write the sums for the doubles plus one and doubles minus one facts. She has started writing sums. Help her find the rest of the sums.

Question 13.
THINK SMARTER
Choose all the doubles facts that can help you solve 4 + 5.

Answer :
9 + 9 = 18 – No
5 + 5 = 10 -Yes
4 + 4 = 8 – Yes

TAKE HOME ACTIVITY
• Have your child explain how to use a doubles fact to solve the doubles plus one fact 4 + 5 and the doubles minus one fact 4 + 3.

Doubles Plus 1 and Doubles Minus 1 Homework & Practice 3.5

Add. Write the doubles fact you used to solve the problem.

Question 1.
8 + 7 = __

Answer:
Doubles plus one fact .

Explanation :
8 + 7 = 15
The number sentence with doubles plus one fact :
7 + 7 + 1 = 15

Question 2.
6 + 7 = __

Answer:
Doubles plus one fact .

Explanation :
6 + 7 = 13
The number sentence with doubles plus one fact :
6 + 6 + 1 = 13

Question 3.
4 + 3 = __

Answer:
Doubles plus one fact .

Explanation :
4 + 3 = 7
The number sentence with doubles plus one fact :
3 + 3 + 1 = 7

Question 4.
2 + 1 = __

Answer:
Doubles plus one fact .

Explanation :
2 + 1 = 3
The number sentence with doubles plus one fact :
1 + 1 + 1 = 3

Question 5.
8 + 9 = __

Answer:
Doubles plus one fact .

Explanation :
8 + 9 = 17
The number sentence with doubles plus one fact :
8 + 8 + 1 = 17

Question 6.
3 + 2 = __

Answer:
Doubles plus one fact .

Explanation :
3 + 2 = 5
The number sentence with doubles plus one fact :
2 + 2 + 1 = 5

Problem Solving

Question 7.
Andy writes an additional fact. One addend is 9. The sum is 17. What is the other addend? Write the additional fact.
__ + ___ = 17

Answer :
9 + 8 = 17
Therefore, other addends = 8

Circle The Greater Addend Go Math Pdf Grade 1 Question 8.
WRITE Math
Use pictures or words to explain how you would use doubles plus one to solve 4 + 5.

Answer :
4 + 5 = 9
By using doubles plus one fact ,
4 + 4 + 1 = 9

Lesson Check

Question 1.
Use the picture. Write a doubles plus one-number sentence.

__ + __ + __

Answer:
The number sentence with double plus one :
2 + 2 + 1 = 5

Question 2.
Which doubles fact helps you solve 8 + 7 = 15? Write the number sentence.
__ + __ + __

Answer:
8 + 7 = 15
The number sentence with doubles plus one fact :
7 + 7 + 1 = 15

Spiral Review

Question 3.
There are 7 large dogs and 2 small dogs. How many dogs are there?
Use ○ to solve. Draw to show your work. Write the number sentence and how many.
__ dogs

Answer :
7 + 2 = 9
Therefore, total number of dogs = 9

Question 4.
What is the sum of 2 and 1 more? Draw the . Write the sum.
__ 2 + 1 = __

Answer : 2 + 1 = 3

+ =

Lesson 3.6 Practice the Strategies

Essential Question
What strategies can you use to solve addition fact problems?

Listen and Draw

Think of different addition strategies. Write or draw two ways you can solve 4 + 3.

Math Talk
MATHEMATICAL PRACTICES
Look for Structure Why is the sum the same when you use different strategies?

Model and Draw

These are the ways you have learned to find sums.

Share and Show MATH BOARD

Question 1.

Answer :
4 + 1 =5
5+ 1 = 6
6+ 1= 7
7 + 1 = 8

Question 2.

5+ 2= 7
6 + 2 = 8
7 + 2 = 9
8 + 2 = 10

Question 3.

Answer :
6 + 3 = 9
7 + 3 = 10
8 + 3 = 11
9 + 3 = 1 2

Question 4.

Answer :
7 + 7 = 14
8 + 8 = 16
9 + 9 =18
10 + 10 = 20

Question 5.

Answer :
Doubles plus one :
5 + 5 + 1 = 11
6 + 6 + 1 = 13
Doubles minus one :
7 + 7 – 1 = 15
8 + 8 -1 = 17

On Your Own

MATHEMATICAL PRACTICE
Apply Add. Color doubles facts . Color count on facts . Color doubles plus one or doubles minus one facts .

Question 6.
9 + 9 = __

Answer :
Doubles fact
9 + 9 = 18

Question 7.
7 + 1 = __

Answer :

7 + 1 = 8

Question 8.
5 + 3 = __

Answer :

5 + 3 = 8

Question 9.
2 + 9 = __

Answer :
2 + 9 = 11

Question 10.
7 + 3 = __

Answer :
7 + 3 = 10

Question 11.
7 + 7 = __

Answer :
7 + 7 = 14

Question 12.
6 + 5 = __

Answer :
6 + 5 = 11

Question 13.
2 + 8 = __

Answer :
8 + 2 = 10

Question 14.
8 + 8 = __

Answer :
8 + 8 = 16

Question 15.
8 +9 = __

Answer :
8 + 9 = 17

Question 16.
9 + 3 = __

Answer :
9 + 3 = 12

Question 17.
7 + 8 = __

Answer :
7 + 8 = 15

THINK SMARTER
Make a counting on the problem. Write the missing numbers.

Question 18.
__ birds were in a tree. __ more birds flew there. How many birds are in the tree now?
__ birds

Answer :
The birds on a tree = 7
The number of birds flew there = 3
Total : 7 + 3 = 10

TAKE HOME ACTIVITY
• Have your child point out a doubles fact, a doubles plus one fact, a doubles minus one fact, and a fact he or she solved by counting on. Have him or her describe how each strategy works.

Practice the Strategies Homework & Practice 3.6

Add. Color doubles facts . Color count on facts . Color doubles plus one or doubles minus one facts .

Question 1.
8 + 8 = __

Answer:
8 + 8 = 16

Question 2.
8 + 1 = __

Answer :
8 + 1 = 9

Question 3.
1 + 7 = __

Answer :
1 + 7 = 8

Question 4.
8 + 3 = __

Answer :
8 + 3 = 11

Go Math Grade 1 Chapter 3 Pdf Lesson 6 Homework 3.6 Question 5.
5 +5 = __

Answer :
5 + 5 = 10

Question 6.
8 + 7 = __

Answer :
8 + 7 = 15

Question 7.
8 + 9 = __

Answer :
8 + 9 = 17

Question 8.
6 + 3 = __

Answer :
6 + 3 = 9

Question 9.
6 + 6 = __

Answer :
6 + 6 = 12

Problem Solving

Make a counting on problem. Write the missing numbers.

Question 10.
__ apples are in a bag. __ more apples are put in the bag. How many apples are in the bag now?
__ apples

Answer :
5 apples are in a bag.
2 more apples are put in the bag.
Total number of apples = 5 + 2 = 7

Question 11.
WRITE Math
Use pictures or words to explain a strategy you would use to find 8 + 9.

Answer :
8 + 9 = 17

Lesson Check

Question 1.
Which strategy would you use to find 2 + 8? Explain how you decided.
_________________________
_________________________

Answer :
Count on.
8 + 2 = 10

Question 2.
What is the sum of 9 + 9? Write the number.
__

Answer: 18
The sum of 9 + 9= 18

Spiral Review

Question 3.
What is the sum of 5 + 2 or 2 + 5? Why is the sum the same?
_________________________
_________________________

Answer: The sum of 5 + 2 or 2 + 5 = 7
The sum is same because

Question 4.
How many flowers are there? Write the number.
3 flowers and 3 more flowers __ flowers

Answer: 6
3 + 3 = 6

Addition Strategies Mid-Chapter Checkpoint

Concepts and Skills

Add. Change the order of the addends. Add again.

Question 1.

Answer :
4 + 8 = 12

Question 2.

Answer :
9 + 7 = 16

Circle the greater addend. Count on to find the sum.

Question 3.

Answer:
Greater addend : 8
1 + 8 = 9

Question 4.

Answer:
Greater addend : 7
3 + 7 = 10

Question 5.

Answer:
Greater addend : 9
9 + 2 = 11

Question 6.

Answer :
Greater addend : 6
6 + 3 = 9

Question 7.

Answer :
Greater addend : 7
7 + 1 = 8

Question 8.

Answer :
Greater addend : 8
2 + 8 = 10

Use doubles to help you add.

Question 9.
7 + 8 = __

Answer :
7 + 8 = 15
Doubles fact :
7 + 7 + 1 = 15

Question 10.
6 + 7 = __

Answer :
6 +7 = 13
Doubles fact :
6 + 6 + 1 = 13

Question 11.
9 + 8 = __

Answer :
9 + 8 = 17
Doubles fact :
8 + 8 +1 = 17

Question 12.
THINK SMARTER
Write a count on 1 fact to show a sum of 8. Then write a doubles fact to show a sum of 8.

Answer :
Count on fact to show sum of 8 =
7 +1 = 8
Doubles fact plus one = 4+ 4+ 1 = 8

Lesson 3.7 Add 10 and More

Essential Question
How can you use a ten frame to add 10 and some more?

Listen and Draw

What is 10 + 5? Use and the ten frame. Model and draw to solve.

Answer:
10+ 5 = 15

Math Talk
MATHEMATICAL PRACTICES
Reasoning Explain how your model shows 10 + 5.

Model and Draw
You can use a ten frame to add 10 + 6.

Share and Show MATH BOARD

Draw to show 10. Draw to show the other addend. Write the sum.

Question 1.

Answer:
10 + 3 = 13

Question 2.

Answer :

Adding Strategies Topic 3 Lesson 3.7 Answer Key Question 3.

Answer :
10+ 1 = 11

Question 4.

Answer :
10 + 2 = 12

Question 5.

Answer :
10+ 4 = 14

Question 6.

Answer :
10+ 7 = 17

On Your Own

MATHEMATICAL PRACTICE
Represent a Problem
Draw to show 10. Draw to show the other addend. Write the sum.

Question 7.

Answer:
10 + 8 = 18

Question 8.

Answer:
10 + 2 = 12

+ =

Question 9.

Answer:
10 + 6 = 16

Question 10.

Answer:
10+9 = 19

Add.

Go Math Grade 1 Chapter 3 Review Test Question 11.

Answer:
10+ 1 = 11

Question 12.

Answer :
4 + 10 = 14

Question 13.

Answer :
5 + 10 = 15

Question 14.

Answer :
10 + 3 = 13

Question 15.

0 + 10 = 10

Question 16.
THINK SMARTER
Draw to show 10. Draw to show the missing addend. Write the missing addend.

Answer:
10+ 4 = 14