We included **H****MH Into Math Grade 1 Answer Key**** PDF** **Module 6 Lesson 7 Solve Addition and Subtraction Problems** to make students experts in learning maths.

## HMH Into Math Grade 1 Module 6 Lesson 7 Answer Key Solve Addition and Subtraction Problems

I can choose ways to solve word problems to find unknown sums, differences, or addends.

**Step It Out**

1. Doug has 15 staplers. 8 are green, and the rest are pink. How many pink staplers does he have?

A. How can you show the problem?

THINK: I can use cubes to show a way to make 15.

B. Write an equation that solves the problem.

Equation: _________

C. There are ___ pink staplers.

Answer:

8 + 7 = 15

There are 7 pink staplers

Explanation:

Doug has 15 staplers

8 are green, and the rest are pink

The subtraction equation that help to solve the problem is

15 + 8 = 7

The addition equation that matches with the problem is

8 + 7 = 15

So, there are 7 pink staplers.

**Step It Out**

2. Lia has some animal books. She gives 9 books to Max. Now she has 5 books. How many books did Lia start with?

A. How can you use a concrete model to show the problem?

THINK: I can draw counters.

B. Write a subtraction equation that matches the problem.

Equation: ___

C. Write an addition equation that solves the problem.

Equation: ___

D. Lia had ___ books to start.

Answer:

Explanation:

I used bar model to solve

The subtraction equation that matches the problem is

14 – 9 = 5

The addition equation that solves the problem is

9 + 5 = 14

Lia had 14 books to start.

**Turn and Talk** Does your answer make sense? Explain.

**Step It Out**

3. Penny puts 11 dog toys in two baskets. How many toys can she put in each basket?

A. How can you use a visual model to show the problem?

THINK: I can use a bar model.

B. How many toys could Penny put in each basket?

__ toys in basket 1 __ toys in basket 2

C. Write an equation that proves your answer is correct.

Equation: _________

Answer:

Explanation:

There could be 5 toys in 1 basket and 6 toys in the other

The equation that proves my answer is

5 + 6 = 11

There are 11 toys in all

Penny can put 5 toys in basket 1, 6 toys in basket 2.

**Check Understanding Math Board**

**Use a bar model and write an equation to solve.**

Question 1.

Jose sees 12 bees. Some fly away. Now there are 3 bees. How many bees fly away?

Equation: _____

____ bees fly away.

Answer:

Explanation:

Jose sees 12 bees. Some fly away

Now there are 3 bees

The subtraction equation that solve the problem is

12 – 3 = 9

Therefore, 9 bees flew away.

**On Your Own**

**Use a bar model and write an equation to solve.**

Question 2.

**Model with Mathematics** There are 15 guinea pigs. 9 eat lettuce. The rest eat carrots. How many guinea pigs eat carrots?

Equation: ___

___ guinea pigs eat carrots.

Answer:

Explanation:

There are 15 guinea pigs. 9 eat lettuce

The rest eat carrots

The subtraction equation that solve the problem is

15 – 9 = 6

Therefore, 6 guinea pigs ate carrots.

Question 3.

**Open Ended** Cindy sees 13 butterflies. Some are orange and some are blue. How many butterflies could be orange, and how many could be blue?

___ orange butterflies

___ blue butterflies

Answer:

Explanation:

Cindy sees 13 butterflies. Some are orange and some are blue

There could be 8 orange butterflies and 5 blue butterflies

The addition equation is 8 + 5 = 13

Therefore, there are 8 orange butterflies and 5 blue butterflies.

**Write an equation to solve.**

Question 4.

**Reason** Jack has some stamps. He gives 8 stamps to Ricardo. Now Jack has 9 stamps. How many stamps did Jack have to start? Draw to show your thinking.

Equation: ___

___ stamps

Answer:

Explanation:

Jack has some stamps

He gives 8 stamps to Ricardo

Now Jack has 9 stamps

The addition equation that solves the problem is

8 + 9 = 17

There are 17 stamps.

Question 5.

**Model with Mathematics** Alicia has 13 toy boats. She gives some to Lara. Now she has 9. How many toy boats does she give to Lara?

Equation: ___

___ toy boats

Answer:

Explanation:

Alicia has 13 toy boats

She gives some to Lara

Now she has 9

The subtraction equation that help to solve the problem is

13 – 9 = 4

Alicia gave 4 toy boats to Lara.

**Add or Subtract.**

Question 6.

6 + 10 = ___

Answer:

6 + 10 = 16

Explanation:

The sum of 6 and 10 is 16

So, 6 + 10 = 16.

Question 7.

12 – ___ = 4

Answer:

12 – 8 = 4

Explanation:

The subtraction equation to solve the problem is

12 – 4 = 8

The difference of 12 and 8 is 4

So, 12 – 8 = 4.

Question 8.

13 – 9 = ___

Answer:

13 – 9 = 4

Explanation:

The difference of 13 and 9 is 4

So, 13 – 9 = 4.

Question 9.

13 = 5 + ___

Answer:

13 = 5 + 8

Explanation:

The subtraction equation to solve the problem is

13 – 5 = 8

The sum of 5 and 8 is 13

So, 5 + 8 = 13.

Question 10.

14 = 7 + ___

Answer:

14 = 7 + 7

Explanation:

The subtraction equation to solve the problem is

14 – 7 = 7

The sum of 7 and 7 is 14

So, 14 = 7 + 7.

Question 11.

11 = 6 + ___

Answer:

11 – 6 = 5

Explanation:

The subtraction equation to solve the problem is

11 – 6 = 5

The sum of 6 and 5 is 11

So, 11 – 6 = 5.

**On Your Own**

**Model with Mathematics Write an equation to solve.**

Question 12.

There are 14 children riding bikes. Some children go home. Now there are 5 children riding bikes. How many children go home?

Equation: ____

___ children go home.

Write to explain your thinking.

Answer:

14 – 9 = 5

9 children go home.

Explanation:

There are 14 children riding bikes

Some children go home

Now there are 5 children riding bikes

The subtraction equation that help to solve the problem is

14 – 5 = 9

Therefore, 9 children went home.

**Model with Mathematics Write an equation to solve. Draw to show your thinking.**

Question 13.

Gia gives 7 grapes to Trish. Now Gia has 9 grapes. How many grapes did Gia start with?

Equation: ______ ___ grapes

Answer:

Explanation:

Gia gives 7 grapes to Trish

Now Gia has 9 grapes

The addition equation that solves the problem is

7 + 9 = 16

There are 16 grapes with Gia to start with.