How to round numbers

Hi Albert, wow that’s a lot of sweets. What’s Jerry doing?

Ah, labelling each jar with the number of sweets. But how do you now how many sweets each jar can hold?

Oh wow, impressive. With something like this you don’t need to be so exact.

You can round the number to give a rough estimate of how much the jar can hold instead… lovely.

Rounding numbers gives a general idea of what the total is. It can make the number easier to understand, quicker to say, and in this case, leave a little wiggle room.

To round a number to the nearest ten, look at the ones.

Yep, that’s the one Jerry. If the number ends in five or more round it up. 156 is rounded up to 160.

But if it’s four or less, then round the numbers down.

To round a number to the nearest hundred, look at the tens digit and apply the same rule.

Five or higher, round up. Four or less, round down.

The same rules apply if we want to round to the nearest 1000. But instead, we look at the hundreds digit and round up or down from there.

Good idea Jerry, I think Albert’s had enough.