7th Math: Lesson 21

Is 5 prime or composite? 

• Prime
• Composite

A prime number

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

2 x 2 x 2 is the prime factorization of

• 6
• 12
• 22
• 8

Use a factor tree to find the prime factorization of 105

• 3 x 5 x 7

• 3 x 5 x 11

• 1 x 2 x 5 x 7

• 2 x 3 5 x 7

Use a factor tree to find the prime factorization of 32

• 2x2x2x4

• 2x2x2x2x2

• 2 x 4 x 4

• 1 x 2 x 2 x 2 x 2

Tags

CCSS.4.OA.B.4

Use a factor tree to find the prime factorization of 60

• 2 x 2 x 3 x 5

• 5 x 6 x 7

• 2 x 3 x 3 x 5

• 4 x 5 x 7

Use a factor tree to find the prime factorization of 33

• 33

• 3 x 11

• 3 x 10

• 2 x 3 x 3 x 3

Is 5, a prime or composite number? 

• Prime
• Composite

Tags

CCSS.4.OA.B.4

Is 12, a prime or composite number? 

• Prime
• Composite

Is 17, a prime or composite number? 

• Prime
• Composite