Factors and Factor Trees

Use a factor tree to find the prime factorization of 50.

• 2 x 2 x 5 x 5

• 5 x 5 x 3 x 2

• 2 x 5 x 5

• 2 x 25

Use a factor tree to find prime factorization of 24.

• 2 x 3 x 2 x 3

• 2 x 3 x 2 x 2

• 6 x 2 x 2

• 2 x 3 x 4

Tags

CCSS.4.OA.B.4

Use a factor tree to find the prime factorization of 60.

• 2 x 3 x 3 x 2

• 2 x 2 x 2 x 3

• 2 x 5 x 2 x 2

• 2 x 3 x 2 x 5

Draw a factor tree for 15 on your white board. What is the correct prime factorization?

• 2 x 5
• 3 x 10
• 3 x 5

Prime numbers have _____ factors.

• no
• 3
• 1
• 2

Tags

CCSS.4.OA.B.4

Composite numbers:

• Are always bigger than prime numbers
• Have more than 2 factors
• Have 2 pairs of factors
• Don't have factors

Tags

CCSS.4.OA.B.4

Which number is NOT a factor of 10?

• 1
• 2
• 3
• 5

Tags

CCSS.4.OA.B.4

Use a factor tree to find the prime factorization of 30

• 2 x 3 x 5

• 3 x 5 x 4

• 3 x 2 x 8

• 9 x 5

Tags

CCSS.4.OA.B.4

What is the missing factor?

• 1

• 2

• 5

• 8

Tags

CCSS.4.OA.B.4

What is the missing factor?

• 3

• 5

• 6

• 7

Tags

CCSS.4.OA.B.4