Unit 7 Review

Ali had 53 blocks and got 4 more. Which model matches this?

• 
• 
• 
• 

How can you solve 65 + 10?

• 70 + 6

• 6 + 5 + 1 + 0

• 60 + 5 + 10

Find the sum of the base ten blocks below.

• 54

• 64

• 66

Sarah is adding 33 and 20 with the model below. She got 35. What is her mistake?

• A. Sarah added 3 tens + 3 ones + 2 ones

• B. Sarah added 3 tens + 5 ones + 2 ones

• C. Sarah added 3 ones + 3 tens + 5 ones.

What is 10 more than 35?

What is 10 less than 76?

Bruce had 60 erasers at home. He took 30 to school. How many erasers did he leave at home?

• A. 6 tens + 3 tens = 9 tens

• B. 6 tens - 3 tens = 63 tens

• C. 6 tens - 3 tens = 3 tens

Nemo had 30 turtle friends. 10 of them swam away. How many turtle friends does Nemo still have?

• 2

• 21

• 20

Show another way of finding the sum of 34 + 6?

• A. 10 + 30 = ⬜

• B. 3 + 4 + 6 = ⬜

• C. 20 + 2 = ⬜

Andy solved the equation 27 - 7 = ⬜ by thinking of the addition equation 7 + ⬜ = 27.

Andy made the number line model below to help him find the missing number. What is the missing number in Andy's equation?

• 20

• 19

• 21