Addition & Subtraction within 100 Review

Find the sum of the base ten blocks below.

• 56

• 46

• 65

• 12

Use the number line below to solve the problem 25 + 4

• 30

• 29

• 10

• 4

Which method is correct for adding 33 + 9?

• 42 = 33 + 7 + 2

• 42 = 33 + 5 + 2

• 42 = 33 + 3 + 3

4. Ted has 52 Pokémon cards. His friend gave him 6 more. Choose the model that shows how many Pokémon cards he has now.

• A

• B

• C

Cara solved the equation 57 – 5 = ____ By thinking of the addition equation 5 + _____ = 57. What is the missing number in Lucy’s equation?

• 5

• 53

• 52

• 63

Joe wants to subtract 5 from 15 on a number line. What should he do to perform this operation?

• Count back 5 steps from 15.

• Count back 5 steps from 10.

• Count back 15 steps from 5.

Use the part of the hundred chart to solve for the difference of 79 and 8.

• 17

• 87

• 71

• 7

 Solve the subtraction problem.

75 – 7 = ?

• 82

• 7

• 68

• 70

What is the difference of 6 – 4?

• 3

• 4

• 6

• 2

What is the sum of 4 + 4?

• 8

• 9

• 10

• 20