Chapter 12 Test

Use mental math. Write the number that is 10 less.

_____ 27

• 27

• 17

• 47

• 37

Rocco brought 24 puppies to the fair. He sold 10 of them. How many crafts does he have left?

• 16

• 10

• 20

• 14

Which number is 10 less than 61?

• 51

• 61

• 71

• 81

Which number is 10 less than 90?

• 83

• 74

• 94

• 80

Which addition equation can you use to find the difference? 70 - 60 = ? Draw a model to check your answer.

• 20 + 50 = 70

• 40 + 30 = 70

• 50 + 20 = 70

• 10 + 60 = 70

Subtract. 9 tens - 4 tens = _____ tens

• 2 tens

• 3 tens

• 4 tens

• 5 tens

Use addition to find the difference.

70 - 50 = ____

_____ + 50 = 70

• 50

• 40

• 20

• 60

Subtract.

8 tens - 6 tens =

• 5 tens

• 4 tens

• 6 tens

• 2 tens

Izzy bakes 60 cookie. She bakes 30 more cookies than Alyssa. How many muffins does Alyssa bake?

• 40

• 30

• 50

• 45

Count back by 10s to subtract. Use the number line to help. 56 - 50 = ____

• 6

• 4

• 8

• 10