mathifykids.com

Rounding Decimals Practice

Practise rounding decimals to the nearest whole number or tenth — the same look-at-one-digit rule you use for whole numbers.

Grades 4–5 · 5.NBT⚡ Estimation
FreeNo sign-up to playNo ads in practiceKid-safe

Practice now

How to round a decimal

Rounding a decimal works exactly like rounding a whole number: you find the place you’re rounding to and look at the single digit just to its right. Decimals only add new place names — tenths, hundredths — to the right of the decimal point.

  1. Find the place you’re rounding to (ones, tenths…).
  2. Look at the digit immediately to its right.
  3. 5 or more rounds up; 4 or less rounds down.
  4. Drop the digits after your rounding place.

Worked examples

To the nearest wholeRound 3.47 — the tenths digit is 4 (4 or less), so round down to 3.
To the nearest tenthRound 3.47 — the hundredths digit is 7 (5 or more), so round up to 3.5.
AD AREA (parent reading zone only — never shown during practice)

Tips & common mistakes

It’s the same skill as whole-number rounding, just with new place names — if your child can round 347 to the nearest ten, they can round 3.47 to the nearest tenth. Type the answer using the decimal-point key.

  • Looking at the wrong digit — always the one just right of the rounding place.
  • Dropping the decimal point and rounding the digits as a whole number.
  • Forgetting that a 5 in that next place rounds up.

Frequently asked questions

How do you round a decimal?

Look at the digit just right of the place you’re rounding to. 5 or more rounds up, 4 or less rounds down, and you drop the digits after.

What is the nearest tenth?

The first place after the decimal point. Rounding 3.47 to the nearest tenth gives 3.5.

Is this different from rounding whole numbers?

No — the rule is identical. Decimals just add place names (tenths, hundredths) to the right of the point.

How do I type a decimal answer?

Use the number keys and the decimal-point key, for example 3 . 5.

What grade is rounding decimals?

It is typically a grade 5 skill, building on whole-number rounding from grades 3–4.

Keep practising

← All decimalsAdding decimalsRounding whole numbers5th grade math