When you do not need to speak or write about exact quantities or measures, learning to round numbers to 10, 100 or 1,000 can be useful. It can make calculations easier and it also helps when you are ...

Leave the digit the same if the next digit is less than 5 (this is called rounding down) but increase it by 1 if the next digit is 5 or more (this is called rounding up). The rounded value must be a ...

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 ...