Add Common Denominator

What is the least common denominator of 2/6 and 7/8?

• 36

• 8

• 18

• 24

What is the least common denominator of 2/4 and 4/7?

• 24

• 7

• 42

• 28

What is the least common denominator of 3/5 and 5/7?

• 35

• 25

• 7

• 30

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

• 6

• 3

• 9

• 21

What is the least common denominator of 1/2 and 3/7?

• 2

• 14

• 7

• 28

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

• 7

• 21

• 18

• 147

Is this a correct answer?

• Yes, the student correctly added.

• No, you cannot add unlike denominators

• No, 5 + 7 is not 12

• No, 2 + 3 is not 5

Find the least common denominator of 1/6 and 5/12.

• 18

• 12

• 6

• 1

Using the chart, find the LCD of 3 and 2.

• 2

• 4

• 8

• 12