Retrieval practice August 21

Which number is not a multiple of 9?

• 18

• 9

• 3

• 36

Which numbers are multiples of 15? Check all that apply

• 3

• 5

• 15

• 30

A prime number

• has one factor
• has more than 2 factors
• has 100 factors
• has exactly 2 factors: 1 and the number

Tags

CCSS.4.OA.B.4

2 x 2 x 2 is the prime factorization of

• 6
• 12
• 22
• 8

Tags

CCSS.4.OA.B.4

Use a factor tree to find the prime factorization of 32

• 2x2x2x4

• 2x2x2x2x2

• 4x4x2

• 2x2x2x2x1

Tags

CCSS.4.OA.B.4

Use a factor tree to find the prime factorization of 60

• 5x3x2x2

• 7x6x5

• 5x3x3x2

• 7x5x4

Tags

CCSS.4.OA.B.4