All the solutions provided in **McGraw Hill Math Grade 2 Answer Key PDF Chapter 3 Lesson 7 Problem-Solving Strategy: Make a Model** will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 2 Answer Key Chapter 3 Lesson 7 Problem-Solving Strategy: Make a Model

Mark and Dan were in a walk-a-thon to raise money for their basketball team. Mark walked 35 blocks.

Dan walked 52 blocks. How many blocks did they walk in all?

- Understand Underline what you know. Circle what you need to find.
- Plan How will I solve the problem?
- Solve make a model.

__87__blocks - Check Is my answer reasonable? Explain.

Explanation:

Mark walked 35 blocks.

Dan walked 52 blocks

35 + 52 = 87

so, they walked 87 blocks.

**Practice the Strategy**

Sara, Mary, and Jonny are collecting shells at the beach. Sara finds 45 shells. Jonny finds 23 shells. Mary finds 15 shells. How many shells do they find?

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

____ shells - Check Is my answer reasonable? Explain.

Explanation:

Sara finds 45 shells. Jonny finds 23 shells.

45 + 23 = 68

Mary finds 15 shells.

68 + 15 = 83

83 shells that they find

**Apply the Strategy**

Question 1.

Karenna ran 15 blocks Tuesday. She ran 20 blocks on Wednesday. How many blocks did she run in all?

____ blocks

Answer:

35 blocks

Explanation:

Karenna ran 15 blocks Tuesday. She ran 20 blocks on Wednesday.

15 + 20 = 35

35 blocks that she run in all.

Question 2.

Bradley got 33 action figures for his birthday. He had 12 already. How many will he have if he buys 15 more?

____ action figures

Answer:

60 action figures

Explanation:

Bradley got 33 action figures for his birthday. He had 12 already.

33 + 12 = 45

if he buys 15 more

45 + 15 = 60

He will be having 60

Question 3.

Nora made 16 points in her basketball game. Jenna made 24 points and Alicia made 22. No one else scored on their team. What was their final score?

_____ points

Answer:

62 points

Explanation:

Nora made 16 points in her basketball game.

Jenna made 24 points

16 + 24 = 40

and Alicia made 22.

40 + 22 = 62

62 was their final score.

**Review the Strategies**

Choose a strategy

- Write a number sentence.
- Find a pattern.
- Make a model.

Question 4.

Melissa has 23 pairs of earrings. She buys 2 more pairs. Then she is given 6 more pairs for her birthday. How many pairs of earrings does she have in all?

___ pairs

Answer:

31 pairs.

Explanation:

Melissa has 23 pairs of earrings. She buys 2 more pairs.

23 + 2 = 25

Then she is given 6 more pairs for her birthday.

25+ 6 = 31

31 pairs of earrings that she have in all

Question 5.

Jessica made muffins for the bake sale. She made 24 blueberry muffins and 10 strawberry muffins. She also made 12 banana muffins. How many muffins did she make in all?

Answer:

46 muffins.

Explanation:

She made 24 blueberry muffins and 10 strawberry muffins.

24 + 10 = 34

She also made 12 banana muffins.

34 + 12 = 46

46 muffins that she make in all.

Question 6.

Jacob and Luis collected glass bottles to recycle. The first day they collected 12 bottles. The second day they collected 15. The third day they collected 18. If this pattern continues, how many will they collect on the fourth day?

____ bottles

Answer:

21 bottles

Explanation:

The first day they collected 12 bottles. The second day they collected 15.

3 x 4 = 12

3 x 5 = 15

3 x 6 = 18

3 x 7 = 21

so, he might be collected 21 bottles

### McGraw Hill My Math Grade 2 Chapter 3 Lesson 7 My Homework Answer Key

**Underline what you know. Circle what you need to find. Make a model to solve.**

Question 1.

Angela and Brittany count 8 windows in the first building, 5 in the next building, and 13 in the last building. How many windows did they count in all?

____ windows

Answer:

26 windows

Explanation:

8 windows in the first building,

5 in the next building,

8 + 5 = 13

and 13 in the last building.

13 + 13 = 26

26 windows that they count in all.

Question 2.

Eric found 14 pennies in the couch, 6 pennies in his mom’s car, and 2 pennies under his bed. How many pennies did he find in all?

______ pennies

Answer:

22 pennies

Explanation:

Eric found 14 pennies in the couch,

6 pennies in his mom’s car,

14 + 6 = 20

and 2 pennies under his bed.

20 + 2 = 22

22 pennies that he find in all.

Question 3.

The girls collected 57 bottle caps. The boys collected 42 caps. How many bottle caps did they collect in all?

_____ cups

Answer:

99 bottle caps

Explanation:

The girls collected 57 bottle caps. The boys collected 42 caps.

57 + 42 = 99

99 bottle caps that they collect in all.

**Math at Home** Ask your child to add 13 + 21 + 37. Hove your child explain how he or she added the numbers.

Explanation:

13 + 21 = 34

34 + 37 = 40

**Fluency Practice**

**Add**

Question 1.

Answer:

Explanation:

The sum of 14 and 3 is 17

14 + 3 = 17

Question 2.

Answer:

Explanation:

The sum of 16 and 6 is 22

16 + 6 = 22

Question 3.

Answer:

Explanation:

The sum of 13 and 8 is 21

13 + 8 = 21

Question 4.

Answer:

Explanation:

The sum of 14 and 9 is 23

14 + 9 = 23

Question 5.

Answer:

Explanation:

The sum of 15 and 6 is 21

15 + 6 = 21

Question 6.

Answer:

Explanation:

The sum of 16 and 3 is 19

16 + 3 = 19

Question 7.

Answer:

Explanation:

The sum of 11 and 9 is 20

11 + 9 = 20

Question 8.

Answer:

Explanation:

The sum of 12 and 2 is 14

12 + 2 = 14

Question 9.

Answer:

Explanation:

The sum of 14 and 0 is 14

14 + 0 = 14

Question 10.

Answer:

Explanation:

The sum of 18 and 5 is 23

18 + 5 = 23

Question 11.

Answer:

Explanation:

The sum of 19 and 1 is 20

19 + 1 = 20

Question 12.

Answer:

Explanation:

The sum of 17 and 2 is 19

17 + 2 = 19

**Fluency Practice**

**Add.**

Question 1.

Answer:

Explanation:

The sum of 13 and 6 is 19

13 + 6 = 19

Question 2.

Answer:

Explanation:

The sum of 16 and 2 is 18

16 + 2 = 18

Question 3.

Answer:

Explanation:

The sum of 13 and 8 is 21

13 + 8 = 21

Question 4.

Answer:

Explanation:

The sum of 26 and 5 is 31

26 + 5 = 31

Question 5.

Answer:

Explanation:

The sum of 13 and 1 is 14

13 + 1 = 14

Question 6.

Answer:

Explanation:

The sum of 13 and 3 is 16

13 + 3 = 16

Question 7.

Answer:

Explanation:

The sum of 21 and 9 is 30

21 + 9 = 30

Question 8.

Answer:

Explanation:

The sum of 16 and 2 is 18

16 + 2 = 18

Question 9.

Answer:

Explanation:

The sum of 11 and 0 is 11

11 + 0 = 11

Question 10.

Answer:

Explanation:

The sum of 13 and 2 is 15

13 + 2 = 15

Question 11.

Answer:

Explanation:

The sum of 13 and 4 is 17

13 + 4 = 17

Question 12.

Answer:

Explanation:

The sum of 12 and 7 is 19

12 + 7 = 19