Unit 2 Review

Billy's Burgers sold a total of 350 burgers one Saturday night.

220 burgers had cheese

15 burgers had mushrooms

The rest of the burgers were plain.

Which equation could be used to determine p, the number of burgers that were plain?

• 350 + (220 + 15) = p

• p + 350 = 220 + 15

• 350 - (220 + 15) = p

• p - 350 = 220 - 15

Mr. Mike packed 8 red pears and 15 green pears into a box for a customer. He packed 7 boxes like this. He used this equation to find p, the number of pears he packed into all the boxes.

x = ( 8 + 15) 7

How many pears did Mr. Fernandez pack into the box?

• 113

• 161

• 30

• Not here

Michael had $50. He took a friend to a baseball game and bought cokes and hot dogs for himself and his friend. Each coke cost $5 and each hot dog cost $4. In the equation below, m represents the amount of money he had left after the baseball game:

m = 50 - [ (2 x 5) + ( 2 x 4) ]

How much money did he have left after the game?

• $38

• $18

• $32

• Not here

A prime number is...

• a number that has only one factor.

• a number that has at least two factors.

• a number that has more than two factors.

• a number that has only two factors.

  (1 and itself)

Which is a prime number?

• 25

• 27

• 21

• 29

Which number below is NOT prime?

• 7

• 9

• 2

• 3

Ms. Norris recorded the number of minutes her students took to finish the math test. Which number is prime?

• 39

• 35

• 30

• 31

Find the prime number.

• 90

• 91

• 97

• 94

What are the first 5 prime numbers?

• 2, 3, 5, 7, 11

• 1, 3, 5, 7, 9

• 1, 3, 5, 11, 13

• 2, 3, 5, 7, 13

Tags

CCSS.4.OA.B.4

Composite numbers:

• Are always bigger than prime numbers
• Have more than 2 factors
• Have 2 pairs of factors
• Don't have factors

Tags

CCSS.4.OA.B.4