Subtract big numbers column by column — borrow a ten when the top digit is too small.
Multi-digit subtraction goes column by column, and when the top digit is too small the child borrows a ten from the next column to keep going. Doing the regrouping step by step builds place-value understanding behind the standard algorithm. Distinct from column addition. Best for Grades 2–4.
A free, no-signup, no-ads math game for Grades 2–4 — practising subtraction, regrouping, borrowing, place-value, multi-digit. Play in your browser on the KidsDoMath games hub or explore more Arithmetic games.
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What math does Regroup Rally practice? Regroup Rally practices Subtraction, Regrouping, Borrowing, Place Value. Multi-digit subtraction goes column by column, and when the top digit is too small the child borrows a ten from the next column to keep going.
What grade is Regroup Rally for? Regroup Rally is built for Grades 2–4 (ages 7–10). It sits in the Arithmetic strand, and it ramps across 8 levels so younger or older players find their own pace.
How do you play Regroup Rally? Subtract big numbers column by column — borrow a ten when the top digit is too small.
Is Regroup Rally free to play? Yes. Regroup Rally is free, with no ads and no sign-up, and it runs in the browser on a phone, tablet or computer.