Use a number line to identify if you need to round up or round down. The whole numbers are equally spaced on this number line. The values increase by each step to the right. Mark the value of 768 ...

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.