Number lines can go up to any number, such as 10, 20, or even more! They help you to see where each number belongs and can be useful when adding and subtracting. This is a number line. This number ...

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 ...