# LCM & GCF Daily Warm-up

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Not sure why they took out LCM and GCF from the curriculum, but we sneak it in every day with a quick 5 min daily practice. Students glue the 1/2 sheet on a piece of paper. They quickly find all the multiples/factors, and then circle the LCM/GCF.

For LCM, I have on the board each day two fractions that incorporate those factors as denominators. The students then use the LCM to create an equivalent fraction for each of the two fractions on the board.

For GCF, they write to the side of the paper the reduced fraction using the GCF

Both the GCF and LCM warm-ups are intended to last an entire quarter.

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, π’/π£ + π€/π₯ = (π’π₯ + π£π€)/π£π₯.)
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