Estimate: 47 + 32, 90, 70, 80, 60, Estimate: 58 + 21, 60, 70, 90, 80, Estimate: 73 - 29, 40, 30, 50, 60, Estimate: 84 - 36, 30, 50, 60, 40, Estimate: 26 + 44, 80, 60, 90, 70, Estimate: 91 - 18, 60, 80, 70, 50, Estimate: 39 + 33, 70, 90, 80, 60, Estimate: 65 - 24, 50, 40, 30, 60, Estimate: 42 + 27, 50, 60, 80, 70, Estimate: 77 - 41, 30, 40, 60, 50

Estimating Sums and Differences

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