When you do not need to speak or write about exact quantities or measures, learning to round decimals can be useful. Rounding decimals is useful when making an estimation. The process is similar to ...

Let’s see what Jerry and Albert are buying for their holiday. Looking good! We should work out how much money they’ll need. Let’s make a rough estimate by rounding the costs to the nearest pound.

Imagine needing to estimate the total cost of the items in your grocery basket to decide whether to put something back. So you round to the nearest dollar for each potential purchase, using the “round ...