Math practice · reimagined
Rounding
Turn Rounding into a fight you actually want to win. Every problem is an attack — solve it faster than your opponent and you land the hit.
Ages 4–99+ · no download · plays in your browser · 23 languages
How it works
Rounding
Pick a fighter, choose Rounding, and trust your numbers. The faster and cleaner you solve, the harder you hit — from gentle early grades all the way to Olympic-level challenges.
Rounding is how you trade a bit of exactness for a number that is easier to carry around in your head.
Picture the number line as a road with signposts every ten. 47 sits between the 40 sign and the 50 sign, and it is closer to 50 — so rounded to the nearest ten, 47 becomes 50. 43 is closer to 40, so it becomes 40.
The only awkward case is landing exactly halfway, like 45. Everyone needs to agree what to do, so the rule is: halfway rounds UP. 45 becomes 50.
Rounding to the nearest hundred works the same way with bigger signposts: 472 sits between 400 and 500, closer to 500.
Decide which signpost is nearer, and type that number.
Every level of Rounding
— Quick answers —
Rounding: the short FAQ
- Is Rounding free to play?
- Yes. Rounding is free to play right in your browser — the whole curriculum, no download, no signup. Paid plans later unlock the full fighter roster, every stage and saved progress.
- Who is Rounding for?
- Anyone from 4 to 99+. The early grades stay gentle for beginners, while the higher tiers will make even the confident sweat.
- Do I need to download anything to play Rounding?
- Nope. Rounding runs in any browser, on a laptop, tablet or phone.
- Can Rounding be used in the classroom?
- Absolutely. Teachers run Rounding with a whole class and track who's improving — see the schools plan for per-student pricing and a teacher dashboard.