Fraction Rap When you’re adding up or taking away fractions, don’t be a hater. Bottom number’s got to be the same… COMMON DENOMINATOR! Multiply fractions, no big problem… TOP TIMES TOP AND BOTTOM TIMES BOTTOM Dividing fractions, easy as pie FLIP THE SECOND AND MULTIPLY!
ADD, SUBTRACT, MULTIPLY, AND DIVIDE: ¼⅔ SUM PRODUCT DIFFERENCE QUOTIENT 11/125/12 ⅙ 8/3
ADD, SUBTRACT, MULTIPLY, AND DIVIDE: 1 ¼2⅔ SUM PRODUCT DIFFERENCE QUOTIENT 47/1217/12 10/3 32/15
You must have common denominators, You must have common denominators, TO ADD OR SUBTRACT, You must have common denominators!
Start with ½ DOUBLE IT: HALVE IT: SQUARE IT: 1 ¼ ¼
Start with ¾ DOUBLE IT: HALVE IT: SQUARE IT: 1 ½ ⅜ 9/16
What happens when you multiply reciprocals? You always get 1!
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