Rounding makes numbers easier to work with. Here are two examples:
Remember, rounded numbers:
Rounding to significant places from the BBC
Follow the menu options or use the following links to learn more and to see examples of how to round numbers:
Try these rounding numbers worksheets to help practice. These printable number lines will also help with rounding numbers.
There are also 3 rounding worksheet generators here that will provide an unlimited number of questions on rounding.
When you hear the following words you should know that they might mean you have to round numbers:
Rules For Rounding Numbers
Try the worksheets below to practice rounding decimals to the nearest thousandth, hundredth, and whole number. There is more here on how to round decimals.
Rounding helps when we are looking for an estimates amount. An estimate gives us a rough idea and it might be a little more or a little less than the exact amount. Here’s an example:
Let’s say we wanted to buy 6 pizzas and we knew they were $19 each. To get a rough idea of the total cost we can round 19 to the nearest 10 to get 20. We can then calculate 6 x $20 to give us an estimate of $120 for the total cost. Estimating is also a good way to check if our answers to a problem are reasonable.
By carrying out an estimate we can check that the answers to problems are sensible.
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