Game: true/false math facts I would use this when teaching about adding multiple numbers. I would have students do this in math centers. I really like how students have to work out all of the problems and then decide if they are true or false.
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add and subtract fractions with unlike denominators Common Core Math 5.NF.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.)