3.1 rounding and estimating End front estimation estimating computations greatest place digit ppt powerpoint presentation right number Front end estimation with adjustment
End front estimation estimating sum digits differences rough ppt powerpoint presentation add End front estimation adjustment Estimating front end ago digit
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ShowMe - estimating quotients with 2 digit divisors
PPT - Estimating Sum and Differences PowerPoint Presentation, free
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3.1 Rounding And Estimating