Presentation is loading. Please wait.

# We need a common denominator to add these fractions.

## Presentation on theme: "We need a common denominator to add these fractions."— Presentation transcript:

We need a common denominator to add these fractions.

7, 14, 21, 28, 35… 2, 4, 6, 8, 10, 12, 14, 16, 18, 20 We need a common denominator to add these fractions.

7, 14, 21, 28, 35… 2, 4, 6, 8, 10, 12, 14, 16, 18, 20 The first number IN COMMON that appears on both lists becomes the common denominator LCM = least common multiple!

x 2 X 7 x 7 7 6 7 + 6 = 13 13

We need a common denominator to add these fractions. 5, 10, 15, 20, 25, 30, 35, 40, 45 7, 14, 21, 28, 35, 42, 49, 56, 63

x 7 X 5 x 5 15 7 15 + 7 = 22 22

We need a common denominator to add these fractions. 7, 14, 21, 28, 35, 42, 49, 56, 63 8, 16, 24, 32, 40, 48, 56, 64, 72

x 7 x 8 32 21 32 + 21 = 53 53

Try These A F E B C D

A F E B C D 17 27 19 20 10 9 41 28 26 21 13 12

Download ppt "We need a common denominator to add these fractions."

Similar presentations

Ads by Google