Round to the nearest whole number, tenth or hundredth, with halfway cases included on purpose so the convention gets practised rather than avoided.
Grade 4–Grade 7 · every refresh draws a new set · answer key included
Rounding decimals worksheets
Round each number to the nearest tenth.
Rounding decimals worksheets — answer key
Round each number to the nearest tenth.
24 problems · US Letter · answer key — 2 sheets, page breaks marked in the preview
Rounding a decimal is the same rule as rounding a whole number, applied one place further right, and it fails for the same reason: pupils look at the wrong digit. What makes decimals harder is that the answer often has fewer digits than the question, so a correct answer looks unfinished — 3.47 rounded to one place is 3.5, and pupils who have been taught to copy the shape of the question write 3.50 or get uneasy. One question in five here is a halfway case, because random decimals almost never land on one and that is exactly the case the rule exists for.
Grade 4 to Grade 7, ages nine to thirteen. Rounding to the nearest whole number comes first, then to a tenth, then to a hundredth — usually alongside money, where rounding to two places has an obvious purpose.
Match the target place to the class and leave the whole part small at first; the size of the number in front of the point has nothing to do with the skill. Use this page immediately before any lesson on estimating, because rounding is the mechanism estimation runs on and a class that is shaky here will not follow the next step.
Looking at the last digit rather than the one after the target place is the dominant error: rounding 3.418 to one place by looking at the 8. The second is rounding twice — 3.418 becomes 3.42 becomes 3.4 — which happens to give the right answer here and the wrong one often enough to matter. The third is writing trailing zeros to match the question, which is not wrong mathematically but shows the pupil is copying a shape.