You can use a number line to help work out whether to round a number up or down. Let's look at rounding 44 to the nearest 10. First put 44 on the number line, then add the closest multiples of ten.

Rounding decimals using a number line. Here is a number line from 6.3 to 6.4. It goes up in intervals of one hundredths. Explore the slideshow to find out which numbers should be rounded up and ...