3.NBT.A.1 games
Play Estimation StationCommon Core 3.NBT.A.1 · Grade 3 · Number & Operations in Base Ten
Round whole numbers to the nearest 10 or 100.
6 free games that practise it — no ads, no sign-up, no student accounts. Easiest first. Each game has a Use in class menu to share it to Google Classroom or Teams.
Best match
- Estimation StationGrades 3–5Round to the nearest ten to estimate fast — round a number, or estimate a sum or difference by rounding each part first.Play
- Rounding RidgeGrades 3–5A number-boulder rests between two camps — read the deciding digit and send it to the nearer one.Play
- Rounding RapidsGrades 3–5Watch a number float on the rapids between two markers, decide which it drifts toward, and steer it to the nearer multiple.Play
Also practises it
- Rounding Estimate SumGrades 3–4Round each number to its nearest ten or hundred, then estimate the sum, difference, or whether an answer is reasonable.Play
- Round DefenseGrades 3–4Numbered meteors rain on a row of cities labelled with tens, hundreds or thousands — tap the city each number rounds to and your interceptor launches from it to meet the meteor.Play
- Number Line NavigatorGrades 2–4Pilot a probe along the number line: glide it to an exact value, and round numbers by parking on the nearest ten or hundred — the line shows which landmark is closer.Play
More grade 3 standards: 3.OA.C.7 · 3.OA.A.1 · 3.NF.A.3 · 3.MD.A.1 · 3.MD.C.7 · 3.MD.D.8
Teachers: share this page with your class