All the solutions provided inÂ **McGraw Hill My Math Grade 1 Answer Key PDF Chapter 2 Lesson 3 Subtraction Number Sentences **will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 1 Answer Key Chapter 2 Lesson 3 Subtraction Number Sentences

**Explore and Explain**

Answer:

Explanation:

There are 7 zebras playing in a field

5 of the zebras get in the pond

I drew an X on the zebras that get in the pond

7 – 5 = 2

So, 2 Zebras are still playing in the field.

**Teacher Directions:** Use to model. There are 7 zebras playing in a field. 5 of the zebras get in the pond. Draw an X on the zebras that get in the pond. How many zebras are still playing in the field? Write the subtraction number sentence.

**See and Show**

You can write a subtraction number sentence.

Answer:

Explanation:

I wrote the number sentence 5 – 2 = 3

5 – 2 = 3 is a subtraction number sentence.

3 is the difference.

**Write a subtraction number sentence.**

Question 1.

Answer:

Explanation:

8 – 3 = 5 is the subtraction number sentence

5 is the difference.

Question 2.

Answer:

Explanation:

3 – 2 = 1 is the subtraction number sentence

1 is the difference.

Question 3.

Answer:

Explanation:

6 – 2 = 4 is the subtraction number sentence

4 is the difference.

Question 4.

Answer:

Explanation:

4 – 2 = 2 is the subtraction number sentence

2 is the difference.

**Talk Math**

What does – mean?

**On My Own**

**Write a subtraction number sentence.**

Question 5.

Answer:

Explanation:

4 – 2 = 2 is the subtraction number sentence

2 is the difference.

Question 6.

Answer:

Explanation:

5 – 3 = 2 is the subtraction number sentence

2 is the difference.

Question 7.

Answer:

Explanation:

6 – 4 = 2 is the subtraction number sentence

2 is the difference.

Question 8.

Answer:

Explanation:

9 – 4 = 5 is the subtraction number sentence

5 is the difference.

Question 9.

Answer:

Explanation:

7 – 6 = 1 is the subtraction number sentence

1 is the difference.

Question 10.

Answer:

Explanation:

2 – 1 = 1 is the subtraction number sentence

1 is the difference.

Question 11.

Answer:

Explanation:

9 – 8 = 1 is the subtraction number sentence

1 is the difference.

Question 12.

Answer:

Explanation:

7 – 4 = 3 is the subtraction number sentence

3 is the difference.

**Problem Solving**

Question 13.

There are 5 cars racing. 2 cars stop. How many cars are still racing?

Answer:

Explanation:

There are 5 cars racing. 2 cars stop

5 – 2 = 3 is the subtraction number sentence

3 is the difference

2 cars are still racing.

Question 14.

Kayla has 4 rockets. She gives some rockets away. She has 1 rocket left. How many rockets did she give away?

Answer:

Explanation:

Kayla has 4 rockets

She gives some rockets away. She has 1 rocket left

4 – 1 = 3 is the subtraction number sentence

3 is the difference

Kayla gave away 3 rockets.

**HOT Problem** By using two of these numbers each time, write as many subtraction number sentences as you can.

_________________________________

_________________________________

_________________________________

_________________________________

Answer:

8 – 6 = 2

8 – 2 = 6

Explanation:

The subtraction sentences using the given numbers are 8 – 6 = 2 and 8 – 2 = 6.

### McGraw Hill My Math Grade 1 Chapter 2 Lesson 3 My Homework Answer Key

**Practice**

**Write a subtraction number sentence.**

Question 1.

Answer:

Explanation:

3 – 1 = 2 is the subtraction number sentence

2 is the difference.

Question 2.

Answer:

Explanation:

9 – 2 = 7 is the subtraction number sentence

7 is the difference.

Question 3.

Answer:

Explanation:

5 – 4 = 1 is the subtraction number sentence

1 is the difference.

Question 4.

Answer:

Explanation:

4 – 3 = 1 is the subtraction number sentence

1 is the difference.

**Write a subtraction number sentence.**

Question 5.

Answer:

Explanation:

8 – 7 = 1 is the subtraction number sentence

1 is the difference.

Question 6.

Answer:

Explanation:

4 – 1 = 3 is the subtraction number sentence

3 is the difference.

Question 7.

There are 7 elephants in a pond. 3 elephants get out. How many elephants are left?

_____ Â ____ Â ____ elephants

Answer:

7 3 4

Explanation:

There are 7 elephants in a pond

3 elephants get out

7 – 3 = 4 is the subtraction number sentence

4 is the difference

4 elephants are left.

**Vocabulary Check**

**Complete each sentence.**

difference subtraction number sentence

Question 8.

6 – 4 = 2 is a _________________________________

Answer:

subtraction number sentence

Explanation:

6 – 4 = 2 is a subtraction number sentence.

Question 9.

In 3 – 2 = 1, the _______ is 1.

Answer:

difference

Explanation

In 3 – 2 = 1, the difference is 1.

**Math at Home** Using buttons, beans, or cereal, have your child act out subtraction stories, Have him or her write subtraction number sentences for the stories.