About the Mental Math Game
Sharpen your mental arithmetic in a one-minute sprint. Choose the operations and level; correct answers move on instantly, so speed is everything.
Key features
- 60-second rounds
- Addition, subtraction, multiplication and division
- Three difficulty levels
- Correct answers accepted instantly
- Shows the questions you skipped
- Best score for each combination
Why practise mental math?
Doing sums in your head is useful every day, from checking a bill to estimating a discount. Short, timed practice builds speed and confidence, and is popular with students preparing for exams and aptitude tests.
Quick tricks
| Trick | Example |
|---|---|
| Add in parts | 47 + 38 = 47 + 30 + 8 = 85 |
| Subtract by counting up | 82 − 47: 47 → 50 → 82 is 3 + 32 = 35 |
| Multiply by 5 | Halve, then × 10: 46 × 5 = 23 × 10 = 230 |
| Multiply by 9 | × 10, then subtract: 9 × 14 = 140 − 14 = 126 |
| Multiply by 11 (two digits) | Add the digits in the middle: 36 × 11 = 3(3+6)6 = 396 |
Related tools
Scientific calculator, percentage calculator, and number memory test.
How to use the Mental Math Game
- Choose a mode or difficulty, or keep the default.
- Press Start (or just click the board) and play with your mouse, finger or keyboard.
- Your score, time and moves are shown as you play.
- Your best score is saved in this browser, so you can try to beat it next time.