All the solutions provided in **McGraw Hill My Math Grade 1 Answer Key PDF Chapter 2 Lesson 2 Model Subtraction **will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 1 Answer Key Chapter 2 Lesson 2 Model Subtraction

**Explore and Explain**

Answer:

Explanation:

There are 10 toys in a toy box

Marty takes 8 toys out of the toy box

Subtract to find

10 – 8 = 2

So, 2 toys are left.

**Teacher Directions:** Use to model. There are 10 toys in a toy box. Marty takes 8 toys out of the toy box. How many toys are left? Write the number.

**See and Show**

When you know the whole and one part, you can subtract to find the other part.

**Use Work Mat 3 and to subtract.**

Question 1.

Answer:

Explanation:

The whole is 5 and one part is 4

Subtract 4 from 5

5 – 4 = 1

The other part is 1.

Question 2.

Answer:

Explanation:

The whole is 8 and one part is 6

Subtract 6 from 8

8 – 6 = 2

The other part is 2.

**Talk Math**

You have 10 counters. 3 are yellow. Tell how you would use the part-part-whole mat to find how many are red. Explain.

Answer:

Explanation:

There are 10 counters

3 are yellow

The whole is 10 and one part is 3

Subtract 3 from 10

10 – 3 = 7

The other part is 7

So, There are 7 red counters..

**On My Own**

**Use Work Mat 3 and to subtract.**

Question 3.

Answer:

Explanation:

The whole is 8 and one part is 5

Subtract 5 from 8

8 – 5 = 3

The other part is 5.

Question 4.

Answer:

Explanation:

The whole is 7 and one part is 3

Subtract 3 from 7

7 – 3 = 4

The other part is 4.

Question 5.

Answer:

Explanation:

The whole is 9 and one part is 4

Subtract 4 from 9

9 – 4 = 5

The other part is 5.

Question 6.

Answer:

Explanation:

The whole is 4 and one part is 1

Subtract 1 from 4

4 – 1 = 3

The other part is 3.

Question 7.

Answer:

Explanation:

The whole is 6 and one part is 4

Subtract 4 from 6

6 – 4 = 2

The other part is 2.

Question 8.

Answer:

Explanation:

The whole is 5 and one part is 3

Subtract 3 from 5

5 – 3 = 2

The other part is 2.

Question 9.

Answer:

Explanation:

The whole is 10 and one part is 5

Subtract 5 from 10

10 – 5 = 5

The other part is 5.

Question 10.

Answer:

Explanation:

The whole is 7 and one part is 1

Subtract 1 from 7

7 – 1 = 6

The other part is 6.

**Problem Solving**

**Solve. Use Work Mat 3 and if needed.**

Question 11.

Clara saw 6 eagles on a limb. 2 eagles flew away. How many eagles were left on the limb?

____ eagles

Answer:

Explanation:

Clara saw 6 eagles on a limb

2 eagles flew away

The whole is 6 and one part is 2

Subtract 2 from 6

6 – 2 = 4

The other part is 4

So, 4 eagles were left on the limb.

Question 12.

There are 10 crocodiles in a pond. 3 get out of the pond. How many crocodiles are left in the pond?

______ crocodiles

Answer:

Explanation:

There are 10 crocodiles in a pond

3 get out of the pond

The whole is 10 and one part is 3

Subtract 3 from 10

10 – 3 = 7

The other part is 7

So, 7 crocodiles are left in the pond.

**Write Math** The whole is 10 and one of the parts is 10. What is the other part? Explain.

_____________________________

_____________________________

_____________________________

_____________________________

Answer:

Explanation:

The whole is 10 and one of the parts is 10

Subtract 10 from 10

That is 0

So, the other part is 0.

### McGraw Hill My Math Grade 1 Chapter 2 Lesson 2 My Homework Answer Key

**Practice**

**Use pennies to subtract. Write the number.**

Question 1.

Answer:

Explanation:

I used pennies to subtract

The whole is 5

One part is 1

Subtract 1 from 5

5 – 1 = 4

The other part is 4.

Question 2.

Answer:

Explanation:

I used pennies to subtract

The whole is 10

One part is 2

Subtract 2 from 10

10 – 2 = 8

The other part is 8.

Question 3.

Answer:

Explanation:

I used pennies to subtract

The whole is 6

One part is 1

Subtract 1 from 6

6 – 1 = 5

The other part is 5.

Question 4.

Answer:

Explanation:

I used pennies to subtract

The whole is 9

One part is 6

Subtract 6 from 9

9 – 6 = 3

The other part is 3.

**Use pennies to subtract. Write the number.**

Question 5.

Answer:

Explanation:

I used pennies to subtract

The whole is 7

One part is 6

Subtract 6 from 7

7 – 6 = 1

The other part is 1.

Question 6.

Answer:

Explanation:

I used pennies to subtract

The whole is 8

One part is 4

Subtract 1 from 5

8 – 4 = 4

The other part is 4.

Question 7.

There are 7 monkeys hanging from a branch. 3 monkeys go away. How many monkeys are still on the branch?

______ monkeys

Answer:

Explanation:

There are 7 monkeys hanging from a branch

3 monkeys go away

I used pennies to subtract

The whole is 7

One part is 3

Subtract 3 from 7

7 – 3 = 4

The other part is 4

4 monkeys are still on the branch.

Question 8.

There are 9 apes eating bananas. 1 ape stops eating. How many apes are still eating bananas?

_____ apes

Answer:

Explanation:

There are 9 apes eating bananas

1 ape stops eating

I used pennies to subtract

The whole is 9

One part is 1

Subtract 1 from 9

9 – 1 = 8

The other part is 8.

**Vocabulary Check**

**Circle the correct answer.**

sum subtract

Question 9.

You know the whole and one part. You can ________ to find the other part.

Answer:

You know the whole and one part. You can subtract to find the other part.

**Math at Home** Have your child use small objects such as cereal or beans to model subtraction.