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**Adding and Subtracting Fractions Review**

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**Once you have a common denominator, then add!**

ADDING FRACTIONS When adding fractions you MUST have a common denominator! Find the smallest number that both 4and 5 will go into. This number is 20. Then multiply both the numerator and denominator to get to 20. 3 4 1 5_ + x 5 = 15 20 = 19 20 Once you have a common denominator, then add! 6th Grade HomePage

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**SUBTRACTING FRACTIONS**

QUIZ SUBTRACTING FRACTIONS 5 6 2 3 X 1 2 5 6 4 Find the least common multiple for 3 and 6. (In this case, 6) Then multiply! 1 6 This is your answer! To subtract fractions you must have a common denominator! 6th Grade HomePage

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We need a common denominator to add these fractions. +

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

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

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+ We need a common denominator to add these fractions. Count by 3's 3, 6, 9, 12, 15, 18, 21, 24, 27 Count by 5's 5, 10, 15, 20, 25, 30, 35, 40, 45

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+ We need a common denominator to add these fractions. Count by 3's 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33 Count by 11's 11, 22, 33, 44, 55, 66, 77…

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+ We need a common denominator to add these fractions. Count by 3's 3, 6, 9, 12, 15, 18, 21, 24, 27 Count by 6's 6, 12, 18, 24,…

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- We need a common denominator to subtract one fraction from another. Count by 2's 2, 4, 6, 8, 10, 12, 14, 16, 18, 20 … Count by 10's 10, 20, 30…

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**5 3 2 5 – 3 = 2 = - = x 5 x 5 x 1 x 1 Make equivalent fractions.**

Subtract. - = 5 – 3 = 2 x 1 2

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