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 ...

We can use significant figures to get an approximate answer to a problem. We can round off all the numbers in a maths problem to \(1\) significant figure to make 'easier' numbers. It is often possible ...

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 ...

Humans are remarkably good at estimating magnitudes. For example, we can estimate the amount of time it will take us to drive from point A to point B, so we know what time we should leave. We estimate ...