Fluently subtracting fractions with same denominators. Finding the missing numerator of a fraction in an equation. Applying the addition and subtraction properties to three fractions.
Mapped to CCSS Section# 4.NF.B.3a, 5.NF.A.1
Understand addition and subtraction of fractions as joining and separating parts referring to the same whole.,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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