Find a Common Denominator

Which of these numbers could NOT be a common denominator for these two fractions?
2/4   and   3/8

• 32

• 12

• 8

• 24

Which of these numbers could NOT be a common denominator for these two fractions?
1/6   and   1/4

• 12

• 18

• 24

• 36

What is the least common denominator you could use to subtract 1/3 and 1/4?

• 3

• 4

• 24

• 12

What is the least common denominator of 1/7 and 3/6?

• 14

• 21

• 7

• 42

What would be the common denominator for adding 3/9 + 4/6?

• 9

• 12

• 18

• 27

Which fraction renames 3/4 with a denominator of 12?

• 3/12

• 4/12

• 12/12

• 9/12

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

What is the least common denominator of 6/8 and 4/12?

• 12

• 24

• 8

• 16

What is the least common denominator of 1/4 and 2/5?

• 5

• 25

• 10

• 20

What is the least common denominator of 1/9 and 2/3?

• 6

• 3

• 9

• 21

Find the lowest common denominator of these fractions: 2/7 and 2/21

• 7

• 21

• 18

• 147