This is a start to examining the work of others! This handout addresses the following CC Standards:
CCSS.MATH.PRACTICE.MP3 Construct viable arguments and critique the reasoning of others.
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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