Prime Factorization

A prime number...

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

A composite number ...

• has more than 2 factors.
• has one factor.
• has at least 10 factors.
• is always a really big number.

Tags

CCSS.4.OA.B.4

Select all of the prime numbers.

• 1

• 2

• 7

• 18

• 21

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

• 2 x 2 x 2 x 4

• 2 x 2 x 2 x 2 x 2

• 4 x 4 x 2

• 2 x 2 x 2 x 2 x 1

Tags

CCSS.4.OA.B.4

Use a factor tree to find the prime factorization of 60

• 5 x 3 x 2 x 2

• 7 x 6 x 5

• 5 x 3 x 3 x 2

• 7 x 5 x 4

Tags

CCSS.4.OA.B.4

Use a factor tree to find the prime factorization of 100.

• 2 x 5 x 10

• 1 x 4 x 5 x 5

• 2 x 2 x 5 x 5

• 5 x 4 x 5

Use a factor tree to find the prime factorization of 42

• 4 x 4 x 3

• 6 x 7

• 7 x 3 x 2

• 5 x 4 x 2

Tags

CCSS.4.OA.B.4

Use a factor tree to find the prime factorization of 33

• 33 x 1

• 11 x 3

• 10 x 3

• 3 x 3 x 3 x 2

Find the prime factorization of 18

• 2 • 9

• 2 • 2 • 3

• 2 • 3 • 3

• 3 • 6

Tags

CCSS.6.EE.A.3