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FRACTION RULES Multiplying and Dividing Fractions

FRACTION RULES Multiplying and Dividing Fractions : 1. Common denominators are NOT needed. 2. Always change mixed numbers to improper Fractions . 3. CANCEL (reduce) between any numerator and any denominator if you can, but cancel only when a multiplication sign is present: Never cancel when you have a division sign. 4. TO MULTIPLY: Multiply numerator times numerator, denominator times denominator. Reduce answer to a mixed number in lowest terms. (In Math 105, answers are often left in improper form) 5. TO DIVIDE: Change the divide sign to a multiplication sign, then invert the second FRACTION and multiply as in Step 4. Examples: Answers: 5432x 158 432513x 548544 834x 21123 92103 20712027 324415 81189 317 21 543 203 2097532xx 143 350 (0) 035 (undefined) FRACTION RULES Adding and Subtracting Fractions : 1. Common (like) denominators are necessary, so change all unlike Fractions to equivalent Fractions with like denominators.

Multiplying and Dividing Fractions: 1. Common denominators are NOT needed. 2. Always change mixed numbers to improper fractions. 3. CANCEL (reduce) between any numerator and any denominator if you can, but cancel only when a multiplication sign is present: Never cancel when you have a division sign. 4.

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  Rules, Multiplying, Fractions, Dividing, Fraction rules multiplying and dividing fractions

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