Factors, Multiples, Primes, and Composites

Stuff you need to know for prealgebra

Review or not?

Multiple Choice

What's the answer to 3/4 + 9/16

• 27/20

• 13/19

• 1

  5/16

• 21/16

Multiple Select

Divide 4/7 ÷ 3/7

• 7/14

• 1/2

• 12/49

• 1

  1/3

Multiple Choice

How do we know if a number is divisible by 5?

• if it is an odd number

• if it ends in 5 or 0

• if it ends in 0

• if it is an even number

Multiple Choice

Which math property says that 4 x 3 = 3 x 4

• associative property

• commutative property

• distributive property

• none of these

Open Ended

What is the absolute value of any number?

Fill in the Blank

What is the product of -12 and 3?

Multiple Choice

Give the prime factorization of 24.

• 2³ x 3

• 3 x 8

• 2² x 7

• 2⁴

Multiple Choice

What is the greatest common factor of 18 and 30?

• 15

• 9

• 10

• 6

Open Ended

List all the factors of 14.

Multiple Choice

Give the first 3 multiples of 6.

• 1, 2, 3

• 18, 36, 54

• 6, 12, 18

• 9, 12, 15

Multiple Choice

Divide -6 ÷ -3

• -2

• 2

• -3

• 6

Multiple Choice

Give the answer in simplest terms: 1 2/3 x 9/11

• 18/27

• 1

  4/11

• 18/33

• 1

  6/11

Multiple Select

Add: -21 + 16

• 5

• -5

• 37

• -37

Multiple Select

Which math property says that 3(4 + 4) = (3x4) + (3x4)?

• associative property

• commutative property

• distributive property

• multiplicative property of 1

Multiple Choice

Use the order of operations: (16 + 4) x 2² - (86 - 6) - 3³

• 9

• -9

• 0

• 48

Multiple Choice

What is a factor?

• answer to an addition problem

• a number that can be divided evenly into another number with no remainder

• the remainder in a division problem

• a new kind of car

How do you find a multiple of a number?

Multiple Select

Which of these are prime numbers?

• 2, 3, 13, 31

• 4, 21, 30, 48

• 1, 6, 14, 108

• none of the above

Fill in the Blank

What should you always do when you add or subtract decimal numbers?