# 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

x 2 X 7 x 7 7 6 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 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 53

15 22 37

36 35 71

4 15 11

2 5 3

Try These A F E B C D

Answers On Next Slide Each click on the next slide reveals an answer. Check your papers. If you discover an incorrect answer, be able to explain your mistake.

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