Rounding Worksheet Generator

Printable worksheets of twelve numbers to round, each on its own number line: to the nearest ten, with two-digit or three-digit numbers, to the nearest hundred, or to the nearest thousand. Every worksheet also has its answer key, with the closer end circled.

Rounding replaces a number with a simpler one close to it, like 40 for 38. To round to the nearest ten, you find the two tens around the number, 30 and 40 for 38, and keep the closer one. On these worksheets, each number sits on a number line between those two tens, hundreds or thousands, and the long tick in the middle marks the halfway point: a number past it rounds up, a number before it rounds down, and a number right on it, like 35, rounds up. Rounding helps to estimate, to check an answer and to do mental math.

1. Choose the settings. Pick how to round: to the nearest ten, with two- or three-digit numbers, to the nearest hundred, or to the nearest thousand.
2. Make a new worksheet. Press New: a new worksheet appears at once, with the same settings. Each one comes from a random number, its seed, kept in the address of the page.
3. Print it. Press Print to print the page on A4 paper, or choose “Save as PDF” in the print window to keep it.
4. Get the answer key. Tick Show the solution: the same worksheet appears with its solution in orange, ready to print as the answer key.
5. Share it. Copy the address of the page: it always gives the same worksheet back.

Every worksheet has twelve different numbers, none of them already rounded, each on a number line from the ten, hundred or thousand just below it to the one just above, with a long tick halfway. Circle the closer end; a number exactly halfway rounds up. The page is made in your browser: nothing is sent to Zuzuzi, and it is free, with no sign-up.