Find the Unknown

27 ÷ _____ = 9

8 x _____ = 32

9 = _____ ÷ 5

What unknown number makes this equation true?

• 819

• 161

• 811

• 809

Answer explanation

Don't forget to borrow and regroup!

What unknown number makes this equation true?

• 56

• 64

• 46

• 54

Jenna made a picture graph in which each star represents some number of students. She forgot to complete the key. The difference between the number of students who voted for blue and the number of students who voted for red is greater than 5 but less than 9. Which of these is a possible number of students each star could represent?

• 3

• 5

• 8

• 6

Answer explanation

It either represents 3 or 4.

If 3...

Blue = 12 students

Red = 6

12 - 6 = 6, which is greater than 5 but less than 9.

If 4...

Blue = 16 students

Red = 8 students

16 - 8 = 8, which is greater than 5 but less than 9.

26 + ? = 28

• 2

• 54

• 20

• 3

5 + ?? = 64

• 69

• 59

• 55

• 65

? + 73 = 77

• 44

• 140

• 4

• 64

25 + ?? = 41

• 66

• 16

• 26

• 6