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Published byBerenice Harrington Modified over 8 years ago

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We need a common denominator to add these fractions.

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

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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!

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

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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

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

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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

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

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Try These A F E B C D

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

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