Chapter 4 - Review

Things to Know

100

Where do we always start when subtracting?

The ones place

200

Fill in the blanks: 

When there's _____ on the floor, we go __________.

When there's more on the floor, we go next door. 

300

True or False: 

When you look at the ones place, you should circle the smaller number. 

False

400

How do you check your subtraction?

By adding the difference (answer) with the smaller number in your subtraction problem. 

500

What does C.U.B.E.S. stand for?

Circle the numbers, Underline the question, Box math signal words, Evaluate steps to take, Solve. 

2 digit subtraction

100

59 - 3

56

200

75 - 8

67

300

66 - 13

53

400

34 - 19

15

500

92 - 48

44

Re-write the equation

100

53 - 4

53

- 4

200

72 - 36

 72

-36

300

I had 35 eggs in the fridge. I used 12. How many do I have left?

 35

-12

400

There were 46 pieces of candy in the jar. Sam ate 20 pieces. Find the difference?

 46 

-20

500

Louis bougt 30 balls for the school. Terrence kicked 12 of the balls over the fence. Then Mauricia flattened 5 more. How many balls can Louis use now?

30

12

- 5

Check your Subtraction

100

Is this correct? Check the subtraction:

64 - 24 = 40 

40 + 24 = 64 

64 matches the 64 in the subtraction problem

So, 64 - 24 = 40 is correct

200

Is this correct?

32 - 19 = 25

25 + 19 = 46

46 does not match 32. 

The subtraction is incorrect.

300

Is this correct:

68 - 19 = 49

49 + 19 = 68 

68 matches the 68 in the subtraction problem, so 

68 - 19 = 49 is correct.

400

Is this correct? 

35 - 10 - 9 = 16

16 + 9 + 10 = 35 

Since 35 matches the 35 in the subtraction problem,

35 - 10 - 9 = 16 is correct

500

Is this correct?

64 - 15 - 2 = 75

75 + 2 + 15 = 89 

Since 89 does NOT match 64 in the subtraction problem, 64 - 15 - 2 = 75 is incorrect.

Word Problems

100

Lucy had 34 balloons. She gave 12 balloons to her classmates.
How many balloons does Lucy have left?

34 - 12 = 22 balloons

200

There were 53 cookies on a plate. The kids ate 28 of them.
How many cookies are left?

53 - 28 = 25 cookies

300

Liam had 89 toy blocks. He lost 47 of them during a move.
How many blocks does Liam have left?

89 - 47 = 42 blocks

400

Emma had 76 stickers. She gave 23 to her friend and 18 to her brother.
How many stickers does she have now?

76 - 23 = 53
53 - 18 = 35 stickers

500

A store had 95 balloons. 38 popped in the morning, and 27 popped in the afternoon.
How many balloons are still in the store?

95 - 38 = 57
57 - 27 = 30 balloons