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Rounding Question Generator

Builds a sheet of rounding questions and shows, for each one, which two multiples the number sits between and which it is closer to. Every question is computed and checked directly — not a fabricated or AI-guessed fact.

What this generator does

The working here is the point. Rather than stating the answer, each question names the two multiples the number falls between and how far past the lower one it sits, which is the reasoning that makes rounding obvious and the digit-by-digit rule that makes it opaque.

How to use this tool

  1. Choose how many questions you want and whether to round to whole numbers or decimal places.
  2. Press make questions, and work through the sheet.
  3. Show the answers to mark it, or show the working to see the two neighbours the number sits between.
  4. Enter a seed word to rebuild the same sheet later.

Understanding the controls

How many questions
One to thirty. Fifteen is usually enough to reveal whether someone is rounding by looking at one digit or by cascading along several.
Level
Gentle rounds to tens and hundreds, standard adds thousands, and stretch switches to rounding a decimal to a given number of places — a different rule to state, though the same reasoning.
Seed
A word rebuilds the identical sheet, which is how two people are given the same numbers to round without a file passing between them.
Show the answers / show the working
The working names the neighbouring multiples and the halfway point, so a disputed answer can be settled from the sheet itself.

Common use cases

  • Rounding practice at home or school
  • Estimation work before a long calculation
  • Quick maths warm-ups
  • Self-testing before a maths quiz

How this generator works

The number is drawn, the remainder past the lower multiple computed, and the halfway case resolved upwards — the convention the working states explicitly. The check does not recompute the rounding: it asserts that the printed answer is a multiple of the unit and that it sits within half a unit of the original, doubled so the comparison stays in whole numbers and nothing is rounded inside the check itself.

Randomness and fairness

Numbers are drawn uniformly, so exact midpoints appear at their natural rate rather than being made more common. Which unit you round to is drawn per question from the set the level allows, so a sheet mixes them.

For how randomness is produced across the whole site, see how Generate Random works.

Limitations and good to know

  • Significant figures behave differently from decimal places, and are set on their own sheet rather than mixed in here.
  • Rounding down or truncating is not produced — every question uses round-to-nearest.
  • Seeded sheets exist for reproducibility, not cryptographic strength; anyone with the same word gets the same numbers to round.

Common mistakes

Rounding digit by digit from the right
Look only at the digit immediately after the place you are rounding to. Rounding 4.4999 to a whole number gives 4, not 5.
Assuming the halfway case is a matter of taste
This sheet always rounds a halfway value up, and says so in the working. Other conventions exist; what matters is that one is stated.

Privacy and your data

Questions are generated in your browser. Neither the seed nor the numbers are uploaded, stored or transmitted anywhere.