All the solutions provided in **McGraw Hill Math Grade 2 Answer Key PDF Chapter 4 Lesson 8 Problem-Solving Strategy: Write a Number Sentence** will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 2 Answer Key Chapter 4 Lesson 8 Problem-Solving Strategy: Write a Number Sentence

There are 24 bees on a flower. 15 bees fly away. How many bees are now on the flower?

- Understand Underline what you know.

Circle what you need to find. - Plan How will I solve the problem?
- Solve Write a number sentence.

- Check Is my answer reasonable? Explain.

Explanation:

The bees which are flew are 15

and the bees on flowers are 9

15 + 9 = 24

so, my answer is reasonable.

**Practice the Strategy**

84 children are at summer camp. 29 children leave to come home early. How many children are still

at summer camp?

- Understand Underline what you know.

Circle what you need to find. - Plan How will I solve the problem?
- Solve I will…

____ ____ ____ - Check Is my answer reasonable? Explain.

Explanation:

84 children are at summer camp.

29 children leave to come home early.

84 – 29 = 55

55 children are still at summer camp

**Apply the Strategy**

**Write a number sentence to solve.**

Question 1.

There are 25 ants in an ant hill. 13 ants leave. How many ants are there now?

____

____ ____ ____ ants

Answer:

25 – 13 = 12 ants.

Explanation:

There are 25 ants in an ant hill.

13 ants leave.

25 – 13 = 12

12 ants are there now

Question 2.

There are 18 lions in the yard at the zoo. 7 lions run into the lion house. How many lions are left in the yard?

____ ____ ____ lions

Answer:

18 – 7 = 11 lions.

Explanation:

There are 18 lions in the yard at the zoo.

7 lions run into the lion house.

18 – 7 = 11

11 lions are left in the yard

Question 3.

Jay planted 12 daisies. His sister, Sarah, planted 29 daisies. How many more daisies did Sarah plant than Jay?

____ ____ ____ lions

Answer:

29 – 12 = 17 daisies.

Explanation:

Jay planted 12 daisies.

Sarah, planted 29 daisies.

29 – 12 = 17

17 more daisies that Sarah plant than Jay.

**Review the Strategies**

Choose a strategy

- Find a pattern.
- Write a number sentence.
- Act it out.

Question 4.

Brenda collects 39 leaves. Janet collects 45 leaves. How many more leaves did Janet collect than Brenda?

___ leaves

Answer:

6 leaves.

Explanation:

Brenda collects 39 leaves.

Janet collects 45 leaves.

45 – 39 = 6

6 more leaves that Janet collect than Brenda

Question 5.

Anna is picking vegetables. She picks 12 tomatoes, 15 peppers, and 5 cucumbers How many vegetables does she pick?

____ vegetables

Answer:

32 vegetables

Explanation:

She picks 12 tomatoes, 15 peppers, and 5 cucumbers

15 + 5 = 20

20 + 12 = 32

32 vegetables that she pick

Question 6.

Scott has 63 blueberries to put in a pie. He eats 21 of the blueberries. How many blueberries are in the pie?

____ blueberries

Answer:

42 blueberries

Explanation:

Scott has 63 blueberries to put in a pie.

He eats 21 of the blueberries.

63 – 21 = 42

42 blueberries are in the pie

Question 7.

Trey’s dog likes dog treats. There are 60 treats in a box. He is allowed 2 treats a day. How many treats will he have left after 10 days?

_____treats

Answer:

40 treats

Explanation:

There are 60 treats in a box.

He is allowed 2 treats a day.

2 x 10 = 20

60 – 20 = 40

40 treats that he have left after 10 days

### McGraw Hill My Math Grade 2 Chapter 4 Lesson 8 My Homework Answer Key

**Practice**

**Write a number sentence to solve.**

Question 1.

Emma has 31 ribbons for her hair. She loses 12 ribbons. How many does she have left?

______ ___ _____ ribbons

Answer:

31 – 12 = 19 ribbons.

Explanation:

Emma has 31 ribbons for her hair.

She loses 12 ribbons.

31 – 12 = 19

19 she have left

Question 2.

Mason’s soccer team has 24 games this season. He has already played 18 games. How many games are left?

______ ___ _____ ribbons

Answer: 6

Explanation:

Mason’s soccer team has 24 games this season.

He has already played 18 games.

24 – 18 = 6

How many games are left

Question 3.

There are 18 ducks in the pond. 11 ducks get out of the pond. How many are still in the pond?

______ ___ _____ ribbons

Answer:

18 – 11 = 7

Explanation:

There are 18 ducks in the pond.

11 ducks get out of the pond.

18 – 11 = 7

7 are still in the pond

**Test Practice**

Question 4.

Karen took a walk on the beach and counted 25 sandcastles. On the way back she counted again but some were gone. There were only 16 left. How many had disappeared while she walked?

(A) 11

(B) 9

(C) 19

(D) 41

Answer:

B

Explanation:

Karen counted 25 sandcastles. she counted again but some were gone.

There were only 16 left.

25 – 16 = 9

9 had disappeared while she walked.

**Math at Home** Ask your child to subtract 52 – 17. Then have your child show you how to check the answer.

Explanation:

52 – 17 = 35

The answer is added to the question to check the answer.

35 + 17 = 52