Prime Factorization

Is 5 prime or composite? 

• Prime
• Composite

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

Use a factor tree to find the prime factorization of 42

• 4x4x3

• 6x7

• 7x3x2

• 5x4x2

Tags

CCSS.4.OA.B.4

Use a factor tree to find the prime factorization of 33

• 33

• 11x3

• 10x3

• 3x3x3x2

What number is never allowed in a factor tree? 

• 13 (it's bad luck!)
• 1 
• 8675309
• 2

Tags

TEKS.MATH.6.7A

A prime number...

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

Tags

CCSS.4.OA.B.4

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

Use a factor tree to find the prime factorization of 45

• 3 x 3 x 5

• 3 x 5 x 4

• 3 x 2 x 8

• 9 x 5

Use a number tree to find the prime factorization of 42

• 4x4x3
• 6x7
• 7x3x2
• 5x4x2