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Published byDortha Haynes Modified over 8 years ago

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1/8 + 1/8

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1/8 + 1/4

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1/4 + 1/4

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1/2 + 1/8

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1/2 + 1/4

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3/8 + 1/4

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3/8 + 3/8

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1/2 + 3/8

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Worksheet

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12 Sector Circle

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1/2 + 1/12

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1/2 + 1/6

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1/2 + 1/4

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1/2 + 1/3

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1/3 + 1/12

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1/3 + 1/6

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1/3 + 1/4

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1/4 + 1/6

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1/4 + 1/12

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1/6 + 1/12

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Worksheet

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REMEMBER: Numerator Denominator Adding/subtracting fractions with the same denominator is easy. You simply add/subtract the numerators. Addition/Subtraction of Fractions Num/Den

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Adding and subtracting fractions with the same denominator is easy. You simply add or subtract the numerators. Same Den

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Adding/subtracting fractions with different denominators is more complicated. You need to find the Lowest Common Multiple (LCM) of the denominators first. Remember: The Lowest Common Multiple of 2 or more numbers is the smallest number that the given numbers will divide into without remainder. 2015 1612 9 86 43 Multiples of 3 and 4 12 is the LCM Find the lowest common multiple of the following numbers: 3 and 45 and 203 and 8 10025 8020 6015 4010 205 Multiples of 5 and 20 20 is the LCM 6424 5621 4818 4015 3212 249 166 83 Multiples of 3 and 8 24 is the LCM LCM

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+ + = 2015 1612 9 86 43 Multiples of 3 and 4 12 is the LCM Equivalent + Diagram 1

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+ Multiples of 5 and 8 7240 6435 5630 4825 4020 3215 1610 85 40 is the LCM Equivalent + = + Diagram 2

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+ 3020 2416 1812 8 64 Multiples of 4 and 6 12 is the LCM + Equivalent = + Diagram 3

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Example questions 24 15 + 8 1 2 20 8 + 5 3 12 1 + 9 Examples + 1

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Example questions 8 6 + 5 4 5 36 14 +33 6 72 40 + 27 Examples + 2

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- - = 2015 1612 9 86 43 Multiples of 3 and 4 12 is the LCM Equivalent - Diagram 1

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- - = 2015 1612 9 86 43 Multiples of 3 and 4 12 is the LCM Equivalent

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- Multiples of 5 and 8 7240 6435 5630 4825 4020 3215 1610 85 40 is the LCM Equivalent - = - Diagram 2

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- Multiples of 5 and 8 7240 6435 5630 4825 4020 3215 1610 85 40 is the LCM Equivalent - =

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- 3020 2416 1812 8 64 Multiples of 4 and 6 12 is the LCM - Equivalent = -Diagram 3

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- 3020 2416 1812 8 64 Multiples of 4 and 6 12 is the LCM - Equivalent =

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Example questions 24 15 - 8 1 2 20 8 - 5 3 12 9 - 1 Examples - 1

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Example questions 8 6 - 5 4 5 36 33 -14 6 72 40 - 27 Examples - 2

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