Estimate 22 to the nearest tens., 10, 20, 30, Estimate 23 to the nearest tens., 30, 10, 20, Estimate 37 to the nearest tens., 40, 30, 50, Estimate 64 to the nearest tens., 50, 60, 70, Estimate 88 to the nearest tens., 90, 100, 80, Estimate 17 to the nearest tens., 10, 30, 20, Complete: There are 22 ducks. There are ____ 20 ducks., plus, equals, about, Which estimate is correct?, 37 is about 30., 37 is about 40., 37 is about 20., Which estimate is correct?, 64 is about 60., 64 is about 50., 64 is about 70., Which estimate is correct?, 88 is about 90., 88 is about 70., 88 is about 80.

UNIT 6 - Estimation

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