Greatest Common Factor and Distributive Property

What is the GCF of 21 and 49?

• 7

• 4

• 5

• 1

What is the GCF 8 and 52?

• 8

• 2

• 4

• 1

What is the GCF of 32 and 81?

• 8

• 81

• 4

• 1

What is the GCF of 30 and 70?

• 5

• 10

• 7

• 1

Use the distributive property to rewrite 15+36

• 3(5+12)

• (15+36)

• 5(3+12)

• 12(3+5)

Use the distributive property to rewrite 24+60 (choose all the correct answers)

• 2(12+30)

• 3(8+20)

• 12(2+5)

• 4(6+14)

Al's garden is 18 feet long and 30 feet wide. He wants to put fence posts the same distance apart on all sides of the garden. What is the greatest distance apart that he can place the posts?

• 3

• 10

• 2

• 6