GCF & Simplifying Fractions 1

List the factors of 12 & 20, then identify the greatest common factor.

12-

20-

GCF=

• 12- 1, 2, 5, 7

  20-10, 20, 30, 40

  GCF 10

• 12-1, 12, 24, 36

  20-20, 40, 60, 80

  GCF 40

• 12-2, 4, 6

  20-1, 10, 20

  GCF 20

• 12-1, 2, 3, 4, 6, 12

  20-1, 2, 4,5,10, 20

  GCF 4

What is the greatest common factor of 10 and 25?

• 5

• 1

• 10

• 2

What is the greatest common factor of 4 and 8?

• 2

• 8

• 4

• 1

What is the greatest common factor of 8 and 10?

• 1
• 3
• 4
• 2

Simplify 

• 1/4
• 1/24
• 6/4
• 1/18

Tags

CCSS.4.NF.A.1

CCSS.4.NF.A.2

Simplify

• 1/5
• 1/3
• 3/5
• 2/3

Tags

CCSS.4.NF.A.1

CCSS.4.NF.A.2

Simplify 

• 1/4
• 1/3
• 1/2
• 1/8

Tags

CCSS.4.NF.A.1

Simplify

• 1/4
• 6/10
• 4/4
• 3/4

Tags

CCSS.4.NF.A.1

The BOTTOM part of the fraction is known as what vocabulary word?

• numerator

• reciprocal

• denominator

• dividend

The TOP part of the fraction is known as what vocabulary word?

• numerator

• denominator

• reciprocal

• divisor