We included **H****MH Into Math Grade 1 Answer Key**** PDF** **Module 4 Lesson 1 Think Addition to Subtract** to make students experts in learning maths.

## HMH Into Math Grade 1 Module 4 Lesson 1 Answer Key Think Addition to Subtract

I Can use addition to help solve a subtraction problem.

**Spark Your Learning**

Jamel has 13 pears. 8 are yellow. The rest are green. How can you use addition to find how many green pears he has?

Answer:

Explanation:

Jamel has 13 pears. 8 are yellow

The rest are green

Start at 8. Count on till 13

8, 9 , 10, 11, 12, 13

I counted 5 more numbers

8 + 5 = 13

So, 13 – 8 = 5

Therefore, Jamel has 5 green apples.

Read the problem aloud. Have pairs of children work together to show how to solve the problem.

**Build Understanding**

There are 9 frogs at the pond. 4 of the frogs swim. The rest sit on a log. How many frogs sit on the log?

9 – 4 =

A. How can you show the problem as addition?

Answer:

B. How can you write an addition equation to help you solve the subtraction equation?

___ + __ = ___

so, 9 – 4 = __

C. ___ frogs sit on the log.

Explanation:

There are 9 frogs at the pond

4 of the frogs swim

The rest sit on a log

Start at 4. Count on till 9

4, 5, 6, 7, 8, 9

I counted 5 more

4 + 5 = 9

So, 9 – 4 = 5

Therefore, 5 frogs sit on the log.

**Turn and Talk** What do you notice about the addition and subtraction equations you used to solve the problem?

Answer:

The addition and subtraction equations that i used to solve the problem has same numbers with different operations.

**Step It Out**

1. 7 girls play basketball. 3 of them wear green. The rest wear blue. How many girls wear blue?

A. There are 7 girls altogether.

THINK: The number I subtract from is ___

B. 3 of the girls wear green.

THINK: The number I subtract is ___

C. Use an addition fact to help you subtract 7 – 3 =

THINK: What number added to 3 makes 7?

3 + ___ = 7

D. So, 7 – 3 = _____ .

E. ___ girls wear blue.

Answer:

4 girls wear blue.

Explanation:

7 girls play basketball

3 of them wear green

Subtract 3 from 7

Use an addition fact to help you subtract 7 -3

Start at 3. Count on till 7

3, 4, 5, 6, 7

I counted 4 more

3 + 4 = 7

So, 7 – 3 = 4

Therefore, 4 girls wear blue.

**Turn and Talk** What do you notice about the number 7 in the addition equation and the subtraction equation?

Answer:

In addition equation the number 7 is the sum of two numbers

In Subtraction equation the number 7 is the number from which we subtract other number to find the difference.

**Step It Out**

2. There are 13 birds in a tree. 9 are red. The rest are blue. How many blue birds are in the tree?

Use addition to solve 13 – 9 = .

A. Use the numbers from the subtraction equation to write an addition equation.

9 + = 13

What number added to 9 makes 13? ____

9 + __ = 13

So, 13 – 9 = ___

B. ___ blue birds are in the tree.

Answer:

4 blue birds are in the tree

Explanation:

There are 13 birds in a tree. 9 are red. The rest are blue

Use the numbers from the subtraction equation to write an addition equation.

9 + = 13

Start at 9. Count on till 13

I counted 4 more

9 + 4 = 13

So, 13 – 9 =

Therefore, there are 4 blue birds in the tree.

**Check Understanding Math Board**

**Write an addition equation to help you subtract.**

Question 1.

Anthony picks 11 flowers. 8 of them are red. The rest are pink. How many pink flowers does he pick?

____ +____ = ___

11 – 8 = ___ ____ pink flowers

Answer:

11 – 8 = 3

3 pink flowers

Explanation:

Anthony picks 11 flowers. 8 of them are red. The rest are pink

11 – 8 =

Start at 8. Count on till 11

8, 9, 10, 11

I counted 3 more

8 + 3 = 11

So, 11 – 8 = 3

Therefore, Anthony picks 3 pink flowers.

**On Your Own**

**Model with Mathematics Write an addition equation to help you subtract.**

Question 2.

Cristian has 14 marbles. 6 are purple. The rest are green. How many green marbles does Cristian have?

___ + ___ = ____

14 – 6 = ___

___ green marbles

Answer:

6 + 8 = 14

14 – 6 = 8

8 green marbles

Explanation:

Cristian has 14 marbles. 6 are purple. The rest are green

14 – 6 =

Start at 6. Count on till14

6, 7, 8, 9, 10, 11, 12, 13, 14

I counted 8 more

6 + 8 = 14

So, 14 – 6 = 8

Therefore, Cristian has 8 green marbles.

Question 3.

There are 8 bugs. 3 are on a leaf. The rest of them are on a stick. How many bugs are on a stick?

___ + ___ = ___

8 – 3 = ___

___ bugs

Answer:

3 + 5 = 8

8 – 3 = 5

5 bugs

Explanation:

There are 8 bugs. 3 are on a leaf

The rest of them are on a stick

8 – 3 =

Start at 3. Count on till 8

3, 4, 5, 6, 7, 8

I counted 5 more

3 + 5 = 8

So, 8 – 3 = 5

Therefore, there are 5 bugs on a stick.

Question 4.

There are 13 plants in the garden. 7 are short. The rest are tall. How many tall plants are in the garden?

___ + ___ = ____

13 – 7 = ___

___ tall plants

Answer:

7 + 6 = 13

13 – 7 = 6

6 tall plants

Explanation:

There are 13 plants in the garden. 7 are short. The rest are tall

13 – 7 =

Start at 7. Count on till 13

7, 8, 9, 10, 11, 12, 13

I counted 6 more

7 + 6 = 13

So, 13 – 7 = 6

Therefore, 6 trees are tall.

**On Your Own**

Question 5.

**Reason** Explain how you can use an addition equation to help you subtract 12 – 7.

Answer:

The addition equation that is related to 12 -7 is 5 + 7 = 12

So, if 5 + 7 = 12 then 12 – 7 = 5.

**Write an addition equation to help you subtract.**

Question 6.

What is 11 – 2?

___ + ___ = ___

So, 11 – 2 = ___

Answer:

2 + 9 = 11

So, 11 – 2 = 9

Explanation:

I used the addition equation 2 + 9 = 11 to find the difference of 11 and 2

The difference of 11 and 2 is 9.

Question 7.

What is 12 – 4?

___ + ___ = ___

So, 12 – 4 = ___

Answer:

4 + 8 = 12

So, 12 – 4 = 8

Explanation:

I used the addition equation 4 + 8 = 12 to find the difference of 12 and 4

The difference of 12 and 4 is 8.

Question 8.

What is 16 – 7?

___ + ___ = ___

So, 16 – 7 = ___

Answer:

7 + 9 = 16

So, 16 – 7 = 9

Explanation:

I used the addition equation 7 + 9 = 16 to find the difference of 16 and 7

The difference of 16 and 7 is 9.

Question 9.

What is 17 – 9?

___ + ___ = ___

So, 17 – 9 = ___

Answer:

9 + 8 = 17

So, 17 – 9 = 8

Explanation:

I used the addition equation 9 + 8 = 17 to find the difference of 17 and 9

The difference of 17 and 9 is 8.

**I’m in a Learning Mindset!**

How did I feel about my learning when I used addition to help me subtract?