Unit 2 Review #1

Solve: 5 × 3,826 =_____

• 590

• 85

• 19,130

• 15,530

Answer explanation

There are 15 skittles in the bowl. That is 3 times as many as the number of M&M's in the bowl. Which equation below represents how many M&M's are in the bowl?

• 15 - 3 = 12

• 15 ÷ 3 = 5

• 15 x 3 = 45

• 15 + 3 = 18

Answer explanation

There are more skittles. That 15 is 3 times more than the number of M&M's, SO 15 divided by 3 shows there are only 5 M&M's.

Which of the following is a prime number?

• 52

• 35

• 21

• 29

Answer explanation

52 - is an even number so you know that 2 is a factor

35 - 5 is definitely a factor because 35 ends in a five

21 - 3 x 7 is 21 so can't be prime (has more than just 2 factors)

29 - ONLY 1 x 29 equals 29

Which choice only shows factors of 24?

• 1, 4, 6, 24

• 25, 26, 27

• 48, 72, 96

• 0, 4, 6

The office has 129 pencils to put equally into 8 boxes. How many pencils will go into each box?

• 16

• 17

• 121

• 137

Answer explanation

Toby and Marshall ran a 25-meter race.

● Toby ran the race in 1 minute 16 seconds.

● Marshall ran the race in 52 seconds.

How many seconds faster did Marshall run the race than Toby?

• 8 seconds

• 54 seconds

• 24 seconds

• 36 seconds

Answer explanation

There are 60 seconds in a minute! So, 60 - 52 is 8 seconds. 8 + 16 equals 24 seconds!

Chloe sold a total of 18 vases of flowers. These vases contained only roses and sunflowers.

● Each vase held 40 flowers.

● She earned $3 for each flower she sold.

● She earned a total of $926 from the roses she sold. What amount of money did Chloe earn from the sunflowers she sold?

• $720

• $1,646

• $1,234

• $987

Answer explanation

Three dogs collected a total of 28,392 dog bones to donate to an animal shelter. Toby collected 8,519 dog bones, while Marshall collected 13,221 dog bones. How many dog bones did Sammy collect?

• 8,230

• 6,652

• 14,080

• 27,920

Answer explanation

Which of the following comparisons BEST represents the equation 32 = 4 × 8?

• 8 is 32 times as many as 4

• 4 is 8 times as many as 32

• 8 is 4 times as many as 32

• 32 is 4 times as many as 8

Answer explanation

"is" means the same thing as "equals"

"times as many" means the same thing a multiply (4x8)

What number is the pattern decreasing by? 67, 59, 51, …

• 8

• 9

• 43

• 44

Answer explanation

67 - 8 = 59

59 - 8 = 51