Skill: integer-operations
Integer Operations Practice
An endless supply of never-repeating integer problems with instant feedback. Add, subtract (including double negatives), multiply, and divide signed numbers — one problem at a time.
1 Practice
Type your answer and press Check answer (or Enter). A wrong answer earns a hint first;
a second miss walks you through the full solution.
How to enter answers
- Type an integer like
-13,5, or0. A leading+is fine too. - Word problems ask for just the number — leave off the °F or the dollar sign.
2 What you’ll practice
Every problem is generated fresh from 12 templates — a problem never repeats until its whole pool is used up.
Adding integers
Same-sign sums, mixed signs where the bigger size wins, and walks that cross zero.
Subtracting integers
Walk left for subtraction, and rewrite double negatives: a − (−b) = a + b.
Multiply, divide, and more
The sign grid in action, exact division, temperature and money word problems, missing addends, and multi-step challenges.
3 Watch out for these
The three mistakes students make most often with integers.
Wrong: −5 − 3 = 8
Right: −5 − 3 = −8 — at −5, walk 3 more left.
Wrong: −4 − (−4) = −8
Right: −4 − (−4) = −4 + 4 = 0. Rewrite it first.
Wrong: (−3)(−3) = −9
Right: (−3)(−3) = 9 — same signs → positive.