We included **H****MH Into Math Grade 1 Answer Key**** PDF** **Module 1 Lesson 7 Choose a Strategy to Add** to make students experts in learning maths.

## HMH Into Math Grade 1 Module 1 Lesson 7 Answer Key Choose a Strategy to Add

I Can choose a strategy to solve an addition problem.

**Step It Out**

There are 8 green bags and 7 red bags. How many bags are there?

1. Oneway: Make a ten to add 8 + 7.

THINK: Add 2 to 8 to make 10. I need to add 7 in all. So, add 5 more.

B. Solve the new equation.

C. So, 8 + 7 = ___

Answer:

Explanation:

There are 8 green bags and 7 red bags

8 + 7 =8 + 2 + 5

10 + 5 = 15

So, 8 + 7 = 15.

2. Another way: Use a doubles fact to help add 8 + 7.

A. 7 + 7 = ___

THINK: 8 + 7 is 1 more.

So,8 + 7 = __

B. There are ___ bags.

Answer:

8 + 7 = 15

Explanation:

7 + 7 = 14

Use doubles fact:

7 + 7 = 14 and 1 more

So, 8 + 7 = 15

There are 15 bags.

**Turn and Talk** Which of the strategies above did you like better? Explain.

**Step It Out**

Jo has 3 roses and 4 tulips. How many flowers does she have?

3. One way: Count on to add 3 + 4.

A. THINK: Start on the greater number. What number do you start on? ___

B. Draw the jumps on the number line. How many jumps do you make? ___

C. So, 3 + 4 = __

Answer:

Explanation:

Jo has 3 roses and 4 tulips

I started on the greater number 4

I drew 3 jumps on the number line

4 + 3 = 7

So, 3 + 4 = 7.

4. Another way: Use a doubles fact to help add 3 + 4.

A. 3 + 3 = ___

THINK: 3 + 4 is 1 more.

So, 3 + 4 = ___

B. Jo has __ flowers.

Answer:

3 + 4 = 7

Explanation:

Use doubles fact:

3 + 3 = 6 and 1 more

So, 3 + 4 = 7

Jo has 7 flowers.

9 dogs play. 3 dogs sleep. How many dogs are there?

5. One way: Count on to add 9 + 3.

A. Start with 9. Count on 3 more.

9, ___, ____, ___

B. So, 9 + 3 = ___.

Answer:

9 + 3 = 12

Explanation:

9 dogs play

3 dogs sleep

I Started with 9 and counted on 3 more

9, 10, 11, 12

So, 9 + 3 = 12.

6. Another way: Make a ten to add 9 + 3.

A. THINK: Add 1 to 9 to make 10.

I need to add 3 in all. So, add 2 more.

B. Solve the new equation.

C. So, 9 + 3 = ___

D. There are ___ dogs

Answer:

Explanation:

9 + 3 = 9 + 1 + 2

10 + 2 = 12

So, There are 12 dogs.

**Check Understanding Math Board**

**Use any strategy. Draw to show your work.**

Question 1.

7 boys wear blue. 6 boys wear red. How many boys are there?

____ boys

Answer:

Explanation:

7 boys wear blue

6 boys wear red

I drew cubes to show the sum

I used the doubles fact 6 + 6 = 12

So, 7 + 6 = 13.

Therefore, there are 13 boys.

**On Your Own**

**Attend to Precision** **Use any strategy. Draw to show your work.**

2. Julian has 7 marbles. His brother gives him 4 more.

How many marbles does Julian have now?

Julian has ___ marbles.

Answer:

Explanation:

Julian has 7 marbles

His brother gives him 4 more

I started counting on 7

I drew 4 jumps

7 + 4 = 11

So, Julian has 11 marbles.

3. Open Ended Use two different strategies to add.

7 + 8 = ___

Answer:

Explanation:

I used counters and cubes to show the sum 7 + 8

In first picture i drew 7 red counters and 8 yellow counters

So, there are 15 counters in all.

In second picture i used doubles fact

7 + 7 = 14 and 1 more

7 + 8 = 15

So, the sum 7 + 8 = 15.

**On Your Own**

**Use any strategy. Write an equation.**

Question 4.

9 children go to the dentist in the morning. 6 children go to the dentist in the afternoon. How many children go to the dentist?

___ + ___ = ___

___ children go to the dentist.

Answer:

Explanation:

9 children go to the dentist in the morning

6 children go to the dentist in the afternoon

I drew counters to show the sum 9 + 6

I drew 9 red counters and 6 yellow counters

I counted all the counters and there are 15 in all

So, 9 + 6 = 15

Therefore, 15 children went to the dentist.

**Attend to Precision Use any strategy. Draw to show your work.**

Question 5.

Julie has 2 stickers. Her sister gives her 8 more. How many stickers does Julie have now?

___ stickers

Answer:

Explanation:

Julie has 2 stickers

Her sister gives her 8 more

I started at the greater number 8

I made 2 jumps

I reached at 10

So, 8 + 2 = 10

Therefore, Julie have 10 stickers.

Question 6.

Jaylen sees 8 bugs in the sky. He sees 9 bugs on flowers. How many bugs does he see?

____ bugs

Answer:

Explanation:

Jaylen sees 8 bugs in the sky

He sees 9 bugs on flowers

I used doubles fact:

8 + 8 = 16 and 1 more

So, 8 + 9 = 17

Jaylen saw 17 bugs in all.

**On Your Own**

Question 7.

3 ducks fly south for the winter. Then 8 more ducks join them. How many ducks fly south now?

___ ducks fly south now.

Which strategy did you use to solve the problem? Explain.

Answer:

Explanation:

3 ducks fly south for the winter

Then 8 more ducks join them

I used number line to solve

I started at the greater number 8

I made 3 jumps

I reached at 11

So, 8+ 3 = 11

Therefore, 11 ducks fly south now.

Question 8.

**Construct Arguments** Choose a strategy you can use to add 6 + 7. Draw or write to show how the strategy works.

Answer:

Explanation:

i drew to show the equation 6 + 7 = 13

I used doubles fact to solve

6 + 6 = 12 and 1 more

So, 6 + 7 = 13.

**Use any strategy to add.**

Question 9.

4 + 5 = ___

Answer:

Explanation:

I used doubles fact:

I drew 4 cubes blue

4 + 4 = 8

I drew i red cube more

So, 4 + 5 = 9.

Question 10.

9 + 7 = ___

Answer:

Explanation:

I used counters

I drew 9 red counters and 8 yellow counters

There 17 counters in all

So, 9 + 8 = 17.

Question 11.

8 + 5 = ___

Answer:

Explanation:

I used counters

I drew 8 red counters and 5 yellow counters

There 13 counters in all

So, 8 + 5 = 13.

Question 12.

6 + 8 = ___

Answer:

Explanation:

I used make ten strategy

6 + 8 = 8 + 6

8 + 2 + 4

10 + 4 = 14

SO, 6 + 8 = 14.

Question 13.

2 + 9 = __

Answer:

Explanation:

I used number line

I started with the greater number 9

I drew 2 jumps

I reached at 11

So, 2 + 9 = 11.

Question 14.

9 + 0 = ___

Answer:

9

Explanation:

9 + 0

As 0 has no value any if we add any number with 0 the sum will be the same number

9 + 0 = 9.