Learn how to subtract fractions like 4/3 and 1/5. Key idea: We must rewrite the fractions to have a common denominator before subtracting them.
Subtracting fractions with unlike denominators is a free educational video by Khan Academy.It helps students in grades 5 practice the following standards 5.NF.A.1.
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1. 5.NF.A.1 : Add and subtract fractions with unlike denominators (including mixed numbers) by replacing given fractions with equivalent fractions in such a way as to produce an equivalent sum or difference of fractions with like denominators. For example, 2/3 + 5/4 = 8/12 + 15/12 = 23/12. (In general, a/b + c/d = (ad + bc)/bd.) .
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