Big Ideas Math Book Grade 2 Chapter 5 Subtraction to 100 Strategies Answer Key is helpful for the students who are willing to be perfect in Math skills. At this Big Ideas Math 2nd Grade 5th Chapter Subtraction to 100 Strategies, you can find the solutions for all the questions in a simple manner. Practice various topics covered in this chapter and prepare well for the exam. Download Big Ideas Math Answers Grade 2 Chapter 5 Subtraction to 100 Strategies PDF for free of cost.

## Big Ideas Math Book 2nd Grade Answer Key Chapter 5 Subtraction to 100 Strategies

Students who are facing difficulties in solving Big Ideas Math Book Grade 2 Chapter 5 Subtraction to 100 Strategies problems have reached the correct place. This BIM Book 2nd Grade 5th Chapter Subtraction to 100 Strategies Answer Key gives the most accurate answers to all the problems you have related to this chapter. It has different methods of solving every question in a simple way to perform in their exams.

This Subtraction to 100 Strategies consists of Subtract Tens Using a Number Line, Subtract Tens and Ones Using a Number Line, Use Addition to Subtract, Decompose to Subtract, Decompose to Subtract Tens and Ones, Use Compensation to Subtract, Practice Subtraction Strategies and Problem Solving: Subtraction. It is also helpful for the students to have a real-life calculation go very smoothly and neat defining their quick responses to daily life tasks.

**Lesson: 1 Subtract Tens Using a Number Line**

- Lesson 5.1 Subtract Tens Using a Number Line
- Subtract Tens Using a Number Line Homework & Practice 5.1

**Lesson: 2 Subtract Tens and Ones Using a Number Line**

- Lesson 5.2 Subtract Tens and Ones Using a Number Line
- Subtract Tens and Ones Using a Number Line Homework & Practice 5.2

**Lesson: 3 Use Addition to Subtract**

**Lesson: 4 Decompose to Subtract**

**Lesson: 5 Decompose to Subtract Tens and Ones**

- Lesson 5.5 Decompose to Subtract Tens and Ones
- Decompose to Subtract Tens and Ones Homework & Practice 5.5

**Lesson: 6 Use Compensation to Subtract**

**Lesson: 7 Practice Subtraction Strategies**

**Lesson: 8 Problem Solving: Subtraction**

**Chapter: 5 – Subtraction to 100 Strategies**

**Organize It**

Use the review words to complete the graphic organizer.

Answer:

**Define It**

Answer:

### Lesson 5.1 Subtract Tens Using a Number Line

Color to show how you can use the hundred chart to solve.

Answer:

**Show and Grow**

Question 1.

70 – 50 = __

Answer : 20

Explanation: 70-50=20 first you subtract since difference is often a synonym for subtraction.

Question 2.

33 – 20 = ___

Answer : 13

Explanation : 33-20=13 first you subtract since difference is often a synonym for subtraction.

**Apply and Grow: Practice**

Question 3.

60 – 40 = __

Answer : 20

Explanation : 60 – 40 = 20 first you subtract since difference is often a synonym for subtraction.

Question 4.

71 – 20 = ___

Answer : 51

Explanation : 71 – 20 = 51 first you substract since difference is often a synonym for substraction.

Question 5.

46 – 30 = ___

Answer : 16

Explanation : 46 – 30 = 16 first you subtract since difference is often a synonym for substraction.

Question 6.

**YOU BE THE TEACHER**

Your friend shows 79 − 40 on a number line. Is your friend correct? Explain.

Answer : True

**Think and Grow: Modeling Real Life**

You have a 74-piece set of magnetic tiles. You use 60 of them to make buildings. How many pieces are left?

Subtraction equation:

Model:

Answer : 74 – 60 = 14

Explanation : 14 pieces are left.

**Show and Grow**

Question 7.

A clown has 62 balloons. She uses 40 of them to make balloon animals. How many balloons are left?

Answer : 62 – 40 = 12

Explanation:

Given,

A clown has 62 balloons.

She uses 40 of them to make balloon animals.

Subtract 40 from 62 you get 12.

12 balloons are left.

Question 8.

**DIG DEEPER!**

There are 35 people at a park. 20 of them leave. Then 10 more arrive at the park. How many people are at the park now?

Answer: 25 people

Explanation:

Given,

There are 35 people at a park. 20 of them leave.

35 – 20 = 15

Then 10 more arrive at the park.

15 + 10 = 25 people

Therefore 25 people are at the park now.

### Subtract Tens Using a Number Line Homework & Practice 5.1

Question 1.

90 – 50 = __

Answer: 40

Explanation:

Question 2.

84 – 60 = ___

Answer: 24

Question 3.

22 – 10 = __

Answer: 12

Question 4.

54 – 50 = ___

Answer: 4

Question 5.

**Number Sense**

Write the equation shown by the number line.

Answer: 100 – 60 = 40

Question 6.

**Modeling Real Life**

There are 52 cards in a deck. You pass out 20 of them. How many cards are left in the deck?

Answer:

Given,

There are 52 cards in a deck. You pass out 20 of them.

52 – 20 = 32

32 cards are left in the deck.

**Review & Refresh**

Question 7.

Answer: 51

Question 8.

Answer: 93

Question 9.

Answer: 54

### Lesson 5.2 Subtract Tens and Ones Using a Number Line

**Explore and Grow**

Color to sh

ow how you can use the hundred chart to solve.

Answer:

**Show and Grow**

Question 1.

80 – 34 = __

Answer: 46

Question 2.

56 – 23 = __

Answer: 33

**Apply and Grow: Practice**

Question 3.

74 – 51 = ___

Answer: 23

Question 4.

86 – 44 = ___

Answer: 42

Question 5.

97 – 61 = ___

Answer: 36

Question 6.

46 – 15 = ___

Answer: 31

Question 7.

69 – 35 = __

Answer: 34

Question 8.

38 – 22 = ___

Answer: 16

Question 9.

**Reasoning**

Complete the number line and the equation.

Answer: 47 – 30 = 17

17 – 2 = 15

**Think and Grow: Modeling Real Life**

You have 85 baseball cards and 54 football cards. How many more baseball cards do you have?

Subtraction equation:

Model:

Answer:

Given,

You have 85 baseball cards and 54 football cards.

85 – 54 = 31

Thus there are 31 more baseball cards.

**Show and Grow**

Question 10.

A carnival has 17 rides and 48 games. How many more games are there?

Answer:

Given,

A carnival has 17 rides and 48 games.

48 – 17 = 31 games

Therefore there are 31 more games.

Question 11.

**DIG DEEPER!**

There are 63 people in a theater, 21 people in the lobby, and 10 people in the parking lot. How many more people are in the theater than in both the lobby and the parking lot?

Answer:

Given,

There are 63 people in a theater, 21 people in the lobby, and 10 people in the parking lot.

21 + 10 = 31

63 – 31 = 32

Thus there are 32 people in the theater than in both the lobby and the parking lot.

### Subtract Tens and Ones Using a Number Line Homework & Practice 5.2

Question 1.

95 – 40 = __

Answer: 55

Question 2.

29 – 12 = __

Answer: 17

Question 3.

58 – 14 = ___

Answer: 44

Question 4.

77 – 31 = ___

Answer: 46

Question 5.

86 – 26 = __

Answer: 60

Question 6.

70 – 18 = __

Answer: 52

Question 7.

**Structure**

Use the number lines to show 84 −62 in two ways.

Answer: 22

Question 8.

**Modeling Real Life**

Your classroom has 26 desks and 38 chairs. How many more chairs are there?

Answer:

Given,

Your classroom has 26 desks and 38 chairs.

38 – 26 = 12 chairs

Thus there are 12 more chairs.

Question 9.

**Modeling Real Life**

A grocery store orders 54 pineapples and 22 watermelons. How many more pineapples are there?

Answer:

Given,

A grocery store orders 54 pineapples and 22 watermelons.

54 – 22 = 32 pineapples

Thus there are 32 more pineapples.

**Review & Refresh**

Is the number even or odd?

Question 10.

Answer: Even

8 is divisible by 2 so 8 is an even number.

Question 11.

Answer: Odd

### Lesson 5.3 Use Addition to Subtract

**Explore and Grow**

Show how you can use a number line to solve.

Answer:

29 + x = 52

x = 52 – 29

x = 23

52 – 29 = 23

**Show and Grow**

Add to find the difference

Question 1.

43 – 15 = __

Answer:

43 – 15 = 28

Question 2.

76 – 59 = __

Answer:

76 – 59 = 17

Apply and Grow: Practice

Add to find the difference.

Question 3.

56 – 27 = __

Answer: 29

Question 4.

21 – 13 = __

Answer: 8

Question 5.

72 – 57 = ___

Answer:

Question 6.

33 – 15 = ___

Answer:

Question 7.

45 – 36 = ___

Answer: 9

Question 8.

61 – 46 = __

Answer: 15

Question 9.

**Structure**

Use addition and the number lines to show 64 − 35 in two ways.

Answer:

**Think and Grow: Modeling Real Life**

A ship has a crew of 52 pirates. Some of them leave. There are 27 left. How many pirates got off the ship?

Model:

Answer:

A ship has a crew of 52 pirates. Some of them leave. There are 27 left.

52 – 27 = 25

Thus 25 pirates got off the ship.

**Show and Grow**

Question 10.

A pumpkin patch has 85 pumpkins. Some of them are picked. There are 48 left. How many pumpkins were picked?

Answer:

Given,

A pumpkin patch has 85 pumpkins. Some of them are picked. There are 48 left.

85 – 48 = 37 pumpkins

Thus 37 pumpkins were picked.

Question 11.

**DIG DEEPER!**

There are 96 treats in a bowl. Newton takes 15 treats. Descartes takes some treats. There are 68 treats left. How many treats did Descartes take?

Answer:

Given,

There are 96 treats in a bowl. Newton takes 15 treats. Descartes takes some treats. There are 68 treats left.

96 – 15 = 81 treats

81 – 68 = 13 treats

Thus Descartes take 13 treats.

### Use Addition to Subtract Homework & Practice 5.3

Add to find the difference.

Question 1.

92 – 67 = __

Answer: 25

Question 2.

43 – 24 = __

Answer: 19

Question 3.

71 – 42 = ___

Answer:

Question 4.

63 – 58 = __

Answer: 5

Question 5.

55 – 19 = __

Answer: 36

Question 6.

86 – 29 = __

Answer: 57

Question 7.

**YOU BE THE TEACHER**

Descartes adds to ﬁnd 35 − 12. Is he correct? Explain.

Answer: Yes he is correct

Question 8.

**Modeling Real Life**

A farmer has 96 cornstalks. Some of them are sold. There are 38 left. How many cornstalks were sold?

Answer:

Given,

A farmer has 96 cornstalks. Some of them are sold. There are 38 left.

96 – 38 = 58

58 cornstalks were sold

Question 9.

**DIG DEEPER!**

There are 56 bouncy balls in a pack. Your friend takes some. You take 23. There are 23 bouncy balls left. How many did your friend take?

Answer:

Given,

There are 56 bouncy balls in a pack. Your friend takes some.

You take 23. There are 23 bouncy balls left.

56 – 23 = 33

33 – 23 = 10

Your friend take 10 bouncy balls.

**Review & Refresh**

Draw to show the time

Question 10.

Answer:

Question 11.

Answer:

### Lesson 5.4 Decompose to Subtract

**Explore and Grow**

Color to show how you can get to a decade number by subtracting.

How can the equation above help you ﬁnd 36 − 9?

______________________________

______________________________

______________________________

Answer:

**Show and Grow**

Break apart the number being subtracted. Then ﬁnd the difference. Use the number line to help.

Question 1.

Answer:

Question 2.

Answer:

Question 3.

75 – 7 = __

Answer: 68

Question 4.

82 – 6 = __

Answer: 76

**Apply and Grow: Practice**

Break apart the number being subtracted. Then ﬁnd the difference.

Question 5.

47 – 8 = __

Answer: 39

Question 6.

56 – 9 = __

Answer: 47

Question 7.

43 – 5 = __

Answer: 38

Question 8.

62 – 6 = __

Answer: 56

Question 9.

__ = 41 – 4

Answer: 37

Question 10.

__ = 44 – 7

Answer: 37

Question 11.

**Reasoning**

Which equation is shown by the number line?

Answer:

50 + 5 = 55

Mark 50 on the line and add 5 from 5 we get 55

55 – 8 = 47

First mark 55 on the line and count 8 before 55 we get 47

47 + 3 = 50

First, mark on 47 and add 3 from 47 we get 50 as an answer.

**Think and Grow: Modeling Real Life**

Your friend has 45 comic books. You have 8 fewer. How many comic books do you have?

Subtraction equation:

Answer:

Given,

Your friend has 45 comic books. You have 8 fewer.

45 – 8 = 37 comic books

**Show and Grow**

Question 12.

Your friend can do 33 tricks on a yo-yo. You can do 9 fewer. How many tricks can you do?

Answer:

Given,

Your friend can do 33 tricks on a yo-yo. You can do 9 fewer.

33 – 9 = 24

Question 13.

Descartes’s walk was 8 minutes longer than Newton’s. Descartes’s walk was 56 minutes. How long was Newton’s walk?

Answer:

Given,

Descartes’s walk was 8 minutes longer than Newton’s.

Descartes’s walk was 56 minutes.

56 – 8 = 48 minutes

Thus Newton’s walk was 48 minutes.

### Decompose to Subtract Homework & Practice 5.4

Break apart the number being subtracted. Then ﬁnd the difference. Use the number line to help

Question 1.

95 – 6 = __

Answer:

Question 2.

86 – 8 = __

Answer:

Question 3.

89 – 9 = __

Answer: 80

Question 4.

82 – 7 = __

Answer: 75

Question 5.

__ = 83 – 5

Answer: 78

Question 6.

__ = 98 – 9

Answer: 89

Question 7.

**Number Sense**

Which way would you break apart 9 to find 25 – 9 ? Explain. Then find the difference.

Answer: 16

Question 8.

**Modeling Real Life**

You build a train track with 32 pieces. You remove 6 pieces. How many pieces does the train track have now?

Answer:

Given,

You build a train track with 32 pieces. You remove 6 pieces.

32 – 6 = 26 pieces

Question 9.

**Modeling Real Life**

You read 42 pages on Friday. You read 8 fewer pages on Saturday. How many pages do you read on Saturday?

Answer:

Given,

You read 42 pages on Friday.

You read 8 fewer pages on Saturday.

42 – 8 = 34 pages

**Review & Refresh**

Question 10.

Answer: 3 rows of 5

5 + 5 + 5 = 15

### Lesson 5.5 Decompose to Subtract Tens and Ones

**Explore and Grow**

Color to show how you can break apart 16 to ﬁnd the difference.

Explain your strategy

______________________________

______________________________

______________________________

Answer:

**Show and Grow**

Break apart the number being subtracted. Then ﬁnd the difference.

Question 1.

Answer:

Question 2.

63 – 26 = __

Answer: 37

**Apply and Grow: Practice**

Break apart the number being subtracted. Then ﬁnd the difference.

Question 3.

32 – 13 = __

Answer: 19

Question 4.

46 – 17 = __

Answer:

Question 5.

93 – 45 = __

Answer: 48

Question 6.

71 – 24 = __

Answer:

Question 7.

**Structure**

Can you use the equations to ﬁnd 87 − 29?

Answer:

**Think and Grow: Modeling Real Life**

How many more pizzas do you sell than Newton?

How many fewer pizzas does Newton sell than Descartes?

Answer:

Number of pizzas Descartes sold = 57

Number of pizzas Newton sold = 38

57 – 38 = 19 fewer pizzas

**Show and Grow**

Question 8.

How many more tickets does Newton sell than Descartes?

Answer:

85 – 47 = 38 more tickets

Thus Newton sell 38 more tickets than Descartes.

Question 9.

**DIG DEEPER!**

Your friend picks 49 apples. 11 apples are green and 14 apples are red. The rest are yellow. How many apples are yellow?

Answer:

Given,

Your friend picks 49 apples. 11 apples are green and 14 apples are red. The rest are yellow.

11 + 14 = 25

49 – 25 = 24 yellow apples

### Decompose to Subtract Tens and Ones Homework & Practice 5.5

Break apart the number being subtracted. Then ﬁnd the difference.

Question 1.

45 – 16 = __

Answer:

Question 2.

52 – 27 = __

Answer:

Question 3.

84 – 55 = __

Answer:

Question 4.

76 – 29 = __

Answer:

Question 5.

__ = 23 – 14

Answer: 9

Question 6.

__ = 68 – 49

Answer: 19

Question 7.

**Reasoning**

Complete the number line and the equation.

Answer:

Question 8.

**Modeling Real Life**

How many more cups does Descartes sell than Newton?

Question 9.

**DIG DEEPER!**

In Exercise 8, 100 cups are sold for the day. Newton sold the rest. How many cups did Newton sell?

**Review & Refresh**

Question 10.

47 + 32 = ___

Answer: 79

Question 11.

74 + 15 = __

Answer: 89

### Lesson 5.6 Use Compensation to Subtract

**Explore and Grow**

Use mental math to ﬁnd each difference.

How did you use mental math and 41 − 20 to ﬁnd each difference?

Answer:

**Show and Grow**

Use compensation to subtract.

Question 1.

Answer:

Question 2.

Answer:

Question 3.

Answer:

Question 4.

Answer:

**Apply and Grow: Practice**

Question 5.

Answer:

Question 6.

Answer:

Question 7.

Answer:

Question 8.

Answer:

Question 9.

35 – 7 = __

Answer: 28

Question 10.

53 – 37 = __

Answer: 16

Question 11.

**Reasoning**

Match the expressions that have the same difference.

Answer:

**Think and Grow: Modeling Real Life**

You blow up 57 balloons for a carnival game. Some of them pop. There are 29 left. How many balloons popped?

Subtraction equation:

Answer:

Given,

You blow up 57 balloons for a carnival game. Some of them pop.

There are 29 left.

57 – 29 = 28

28 balloons are popped.

**Show and Grow**

Question 12.

There are 66 cars in a parking lot. Some of them leave. There are 31 left. How many cars leave the parking lot?

Answer:

Given,

There are 66 cars in a parking lot. Some of them leave. There are 31 left.

66 – 31 = 35

35 cars leave the parking lot.

Question 13.

You have 78 pictures on your tablet. You take 4 more pictures. Then you delete 17. How many pictures are on your tablet now?

Answer:

Given,

You have 78 pictures on your tablet. You take 4 more pictures. Then you delete 17.

78 + 4 = 82

84 – 17 = 67

67 pictures are on your tablet now.

Question 14.

You pick 59 strawberries. You eat 5 of them. Then you give 22 to your friend. How many strawberries do you have left?

Answer:

Given,

You pick 59 strawberries. You eat 5 of them. Then you give 22 to your friend.

59 – 5 = 54

54 – 22 = 32

Thus 32 strawberries are left.

### Use Compensation to Subtract Homework & Practice 5.6

Use compensation to subtract.

Question 1.

Answer:

Question 2.

Answer:

Question 3.

Answer:

Question 4.

Answer:

Question 5.

27 – 6 = __

Answer: 21

Question 6.

67 – 14 = __

Answer: 53

Use compensation to subtract.

Question 7.

77 – 52 = __

Answer: 25

Question 8.

69 – 44 = ___

Answer: 25

Question 9.

**Reasoning**

Use the numbers to complete the problem.

Answer:

Question 10.

**Modeling Real Life**

There are 36 boats on a lake. Some of them leave. There are 21 boats left. How many boats leave the lake?

Answer:

Given,

There are 36 boats on a lake. Some of them leave. There are 21 boats left.

36 – 21 = 15

15 boats leave the lake.

**Review & Refresh**

Question 11.

Circle groups of 3. Write a repeated addition equation to match.

Answer: 4 groups of 3

3 + 3 + 3 + 3 =12

### Lesson 5.7 Practice Subtraction Strategies

**Explore and Grow**

Use any strategy to ﬁnd the difference.

Compare your strategy to your partner’s strategy. How are your strategies alike? How are they different?

_______________________________

_______________________________

_______________________________

Answer: 42

Use mental math strategy to find the difference of the two numbers 76 and 34

76 – 34 = 42

**Show and Grow**

Question 1.

81 – 50 = ___

Answer: 31

Question 2.

94 – 8 = __

Answer: 86

Question 3.

58 – 49 = __

Answer: 9

Question 4.

77 – 35 = ___

Answer: 42

**Apply and Grow: Practice**

Question 5.

97 – 71 = __

Answer: 26

Question 6.

68 – 9 = __

Answer: 59

Question 7.

52 – 28 = ___

Answer: 24

Question 8.

83 – 60 = ___

Answer: 23

Question 9.

__ = 75 – 11

Answer: 64

Question 10.

___ = 46 – 35

Answer: 11

Question 11.

**YOU BE THE TEACHER**

Your friend uses compensation to subtract. Is your friend correct? Explain.

Answer:

35 – 30 = 5

Yes, your friend is correct.

Question 12.

A store has 38 hats. 17 of them are sold. How many hats are left?

Answer:

Given,

A store has 38 hats. 17 of them are sold.

38 – 17 = 21

21 hats are left.

**Think and Grow: Modeling Real Life**

You have 41 toys. You put some away. There are 22 toys left. How many toys did you put away?

Subtraction equation:

Answer:

Given,

You have 41 toys. You put some away.

There are 22 toys left.

41 – 22 = 19 toys

Thus you put away 19 toys.

**Show and Grow**

Question 13.

A teacher has 62 prizes. He gives some away. There are 26 left. How many prizes did the teacher give away?

Answer:

Given,

A teacher has 62 prizes. He gives some away. There are 26 left.

62 – 26 = 36

Thus the teacher gives away 36 prizes.

Question 14.

A roller-skating rink rents 28 pairs of skates. There are 52 pairs left. How many pairs of skates were there to start?

Answer:

Given,

A roller-skating rink rents 28 pairs of skates. There are 52 pairs left.

52 + 28 = 80

80 pairs of skates were there to start.

Question 15.

A baker has 16 loaves of french bread and 31 loaves of wheat bread. She sells 18 loaves. How many loaves does the baker have left?

Answer:

Given,

A baker has 16 loaves of french bread and 31 loaves of wheat bread. She sells 18 loaves.

16 + 31 = 47 loaves

47 – 18 = 29 loaves

The baker has left 29 loaves.

### Practice Subtraction Strategies Homework & Practice 5.7

Question 1.

50 – 20 = __

Answer:

By using the mental math we can subtract the two numbers 50 and 20

50 – 20 = 30

Question 2.

62 – 30 = ___

Answer:

By using the mental math we can subtract the two numbers 62 and 30

62 – 30 = 32

Question 3.

88 – 64 = ___

Answer:

By using the mental math we can subtract the two numbers 88 and 64

88 – 64 = 24

Question 4.

42 – 17 = __

Answer:

By using the mental math we can subtract the two numbers 42 and 17

42 – 17 = 25

Question 5.

__ = 97 – 56

Answer:

By using the mental math we can subtract the two numbers 97 and 56

97 – 56 = 41

Question 6.

___ = 71 – 18

Answer:

By using the mental math we can subtract the two numbers 71 and 18

71 – 18 = 53

Question 7.

___ = 63 – 25

Answer:

By using the mental math we can subtract the two numbers 63 and 25

63 – 25 = 38

Question 8.

__ = 21 – 6

Answer:

By using the mental math we can subtract the two numbers 21 and 6

21 – 6 = 15

Question 9.

**Number Sense**

Which expressions have a difference of 24?

Answer:

Question 10.

**Modeling Real Life**

27 dogs were adopted from a shelter. There are 14 left. How many dogs were there to start?

Answer:

Given,

27 dogs were adopted from a shelter. There are 14 left.

27 – 14 = 13

Question 11.

**Modeling Real Life**

86 hot dogs were sold at a baseball game. There are 14 left. How many hot dogs were there to start?

Answer:

Given,

86 hot dogs were sold at a baseball game. There are 14 left.

86 – 14 = 72 hot dogs

**Review and Refresh**

Question 12.

Circle the shapes that show halves.

Answer:

The above two shapes are divided into two equal parts.

Thus the second figure and fourth figure are halves.

### Lesson 5.8 Problem Solving: Subtraction

**Explore and Grow**

Model the story.

Newton collects 58 ﬂowers. He gives 27 away. How many ﬂowers does Newton have left?

Answer:

Given,

Newton collects 58 ﬂowers. He gives 27 away.

58 – 27 = 31

Thus 31 flowers are left.

Newton gives 11 more ﬂowers away. How many ﬂowers does Newton have now?

Answer:

Given,

31 – 11 = 20

Newton has 20 flowers now.

**Show and Grow**

Question 1.

There are 60 kids at a summer camp. 26 are swimming. 15 are playing soccer. The rest are hiking. How many kids are hiking?

Answer:

Total kids = 60

Swimming = 26

Playing soccer = 15

Hiking = 60 – 26 – 15 = 19 .

**Apply and Grow: Practice**

Question 2.

Your class recycles 72 cans. You collected 18 of them. Your friend collected 9. The other students collected the rest. How many cans did the other students collect?

Answer:

Given,

Your class recycles 72 cans. You collected 18 of them.

72 – 18 = 54

Your friend collected 9. The other students collected the rest

54 – 9 = 45

Therefore the other students collect 45 cans.

Question 3.

98 people visit the library in a week. 34 visit on Monday. 14 visit on Tuesday. How many people visit the library the rest of the week?

Answer:

Given,

98 people visit the library in a week. 34 visit on Monday. 14 visit on Tuesday.

34 + 14 = 48

98 – 48 = 50

50 people visit the library the rest of the week.

Question 4.

You have 61 stickers. You give 24 stickers to your friend. Then you get 6 more stickers. How many stickers do you have now?

Answer:

Given,

You have 61 stickers. You give 24 stickers to your friend.

61 – 24 = 37 stickers

Then you get 6 more stickers.

37 + 6 = 43 stickers

Thus you have 43 stickers now.

**Think and Grow: Modeling Real Life**

You collect 47 pine cones. Your friend collects 21 fewer than you. How many pine cones do you and your friend collect in all?

Answer:

Given,

You collect 47 pine cones. Your friend collects 21 fewer than you.

47 – 21 = 26

Now we have to find how many pine cones do you and your friend collect in all.

47 + 26 = 73 pine cones

**Show and Grow**

Question 5.

A garbage truck collects trash from 68 trash cans. Another truck collects trash from 39 fewer cans. How many cans of trash do the trucks collect from in all?

Explain the steps you used to solve the problem.

_________________________________

_________________________________

_________________________________

Answer:

Given,

A garbage truck collects trash from 68 trash cans. Another truck collects trash from 39 fewer cans

68 – 39 = 29 trash cans are collected by another cans.

68 + 29 = 97 trash cans

### Problem Solving: Subtraction Homework & Practice 5.8

Question 1.

There are 39 people in a pool. 8 are ﬂoating on rafts. 11 are playing a game. The rest are swimming laps. How many people are swimming laps?

Answer:

Given,

There are 39 people in a pool. 8 are ﬂoating on rafts. 11 are playing a game. The rest are swimming laps.

39 – 19 = 20

Thus 20 people are swimming laps.

Question 2.

Newton collects 24 rocks. He gives 13 to Descartes. Then Newton collects 8 more rocks. How many rocks does Newton have now?

Answer:

Given,

Newton collects 24 rocks. He gives 13 to Descartes.

24 – 13 = 11

Then Newton collects 8 more rocks

11 + 8 = 19

Newton has 19 rocks now.

Question 3.

**Modeling Real Life**

You use 76 craft sticks. Your friend uses 62 fewer than you. How many craft sticks do you and your friend use in all?

Answer:

Given,

You use 76 craft sticks. Your friend uses 62 fewer than you.

76 – 62 = 14 craft sticks

your friend uses 14 craft sticks

76 + 14 = 90 craft sticks

Question 4.

**Modeling Real Life**

You put 52 photos in an album. Your friend puts in 17 fewer than you. How many photos do you and your friend put in the album in all?

Answer:

Given,

You put 52 photos in an album. Your friend puts in 17 fewer than you.

52 – 17 = 35 photos

52 + 35 = 87 photos

Thus 87 photos you and your friend put in the album in all.

**Review & Refresh**

Question 5.

Answer: A hexagon is a polygon that contains 6 straight sides and 6 vertices.

Question 6.

Answer: A triangle is a polygon that consists of 3 straight sides and 3 vertices.

### Subtraction to 100 Strategies Performance Task

A science class uses an incubator to hatch chicken eggs.

Question 1.

The temperature of the incubator must be 99°F. The current temperature is 25°F less than the correct temperature. What is the current temperature?

Answer:

Given,

The temperature of the incubator must be 99°F. The current temperature is 25°F less than the correct temperature.

99°F – 25°F = 74°F

The current temperature is 74°F.

Question 2.

a. The school has 4 incubators. Each one has 8 eggs. Each egg must be rotated 3 times every day. How many total rotations must be made to all of the eggs in all 4 incubators?

Answer:

Given,

The school has 4 incubators.

Each one has 8 eggs. Each egg must be rotated 3 times every day.

8 × 4 = 32 eggs in all 4 incubators.

32 × 4 = 128 rotations

b. Two of your friends each complete 25 rotations. How many rotations are left?

Answer:

Two of your friends each complete 25 rotations.

128 – 25 = 103 rotations are left

Question 3.

a. The first egg hatches at 11:00. The second egg hatches a half hour late. What time does the second egg hatch?

Answer:

Given,

The first egg hatches at 11:00. The second egg hatches a half hour late.

11:00 + 00:30 = 11:30

b. The third egg hatches an hour after the second egg. What time does the third egg hatch?

Answer:

Given,

The third egg hatches an hour after the second egg.

11:30 + 1:00 = 12:30

### Subtraction to 100 Strategies Activity

**Three in a Row: Subtraction**

**To Play:** Players take turns. On your turn, spin both spinners. Subtract the numbers, and cover the difference on the game board. Continue until someone gets three in a row.

### Subtraction to 100 Strategies Chapter Practice 5

**5.1 Subtract Tens and Ones Using a Number Line**

Question 1.

90 – 40 = __

Answer: 50

Question 2.

66 – 20 = ___

Answer: 46

**5.2 Subtract Tens and Ones Using a Number Line**

Question 3.

78 – 32 = __

Answer:

Question 4.

49 – 16 = ___

Answer:

Question 5.

**Modeling Real Life**

You have 54 stickers and 21 key chains. How many more stickers do you have than key chains?

Answer:

Given,

You have 54 stickers and 21 key chains.

54 – 21 = 33 stickers

Thus you have 33 stickers than key chains.

**5.3 Use Addition to Subtract**

Add to ﬁnd the difference.

Question 6.

44 – 28 = __

Answer:

Question 7.

84 – 56 = __

Answer:

**5.4 Decompose to Subtract**

Break apart the number being subtracted. Then ﬁnd the difference.

Question 8.

44 − 5 = __

Answer: 39

Break the number into two parts and find the difference of two numbers.

Question 10.

67 − 9 = __

Answer: 58

Break the number into two parts and find the difference of two numbers.

Question 11.

32 − 4 = ___

Answer: 28

Break the number into two parts and find the difference of two numbers.

Question 12.

**Number Sense**

Which way would you break apart 8 to ﬁnd 56 − 8? Explain.

Answer: Both are correct to use break apart strategy to find the difference between 56 and 8.

**5.5 Decompose to Subtract Tens and Ones**

Break apart the number being subtracted. Then ﬁnd the difference.

Question 13.

Answer:

Question 14.

Answer:

**5.6 Use Compensation to Subtract**

Use compensation to Subtract

Question 15.

Answer:

Question 16.

Answer:

Question 17.

**Reasoning**

Match the expressions that have the same difference.

Answer:

**5.7 Practice Subtraction Strategies**

Question 18.

58 − 36 = ___

Answer: 22

Question 19.

67 − 52 = ___

Answer: 15

**5.8 Problem Solving: Subtraction**

Question 20.

There are 31 papers to pass out. You pass out 12 papers. Then you pass out 8 more. How many papers do you have left?

Answer:

Given,

There are 31 papers to pass out. You pass out 12 papers.

31 – 12 = 19 papers

Then you pass out 8 more.

19 + 8 = 27 papers are left.

Question 21.

47 students are on the playground. 23 fewer students are playing soccer than on the playground. How many students are on the playground and playing soccer in all?

Answer:

Given,

47 students are on the playground.

23 fewer students are playing soccer than on the playground.

47 – 23 = 24 students

47 + 24 = 71 students

*Final Words:*

I hope the data mentioned here about Big Ideas Math Answers Grade 2 Chapter 5 Subtraction to 100 Strategies are useful to score better marks in the exam. Students are advised to prepare well by referring Big Ideas Math Book Grade 2 Chapter 5 Subtraction to 100 Strategies Answer Key. Bookmark our site https://bigideasmathanswer.com/ to get the updates on other solution keys of Big Ideas Math Grade 2 Chapters.