Back Exploring whole numbers ( Number Operations & Number Theory )
T
erm    : 1 
Module : 1 - Capturing Data 
Unit 1    : Numbers Made Easy  ( Approximation & Estimation )   
               
Approximating and Estimating Calculations
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 Approximation - Using Front-end rounding

 

 Approximation - Using number of tens/hundreds, rounding.

 

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