Solve as many as you can before time runs out. Pick operations and duration, then press Start.
Press Start to begin.
0
Score
0
Solved
—
Time left
—
Accuracy
What a timed drill actually builds
Working out 7 times 8 by adding sevens and recalling that it is 56 are two completely different acts. The first uses working memory and takes seconds; the second is retrieval from long-term memory and takes almost none. A timed drill is designed to push you from the first to the second, because the clock removes the option of calculating your way through.
That distinction matters well beyond arithmetic. Every mental step you have to compute occupies space that could hold the actual problem, which is why fluency with small facts makes longer problems feel easier rather than merely faster.
Shortcuts worth having automatic
Adding 9 is adding 10 and taking one back. The same trick handles 19, 29 and 99.
Subtracting is often easier counted upwards. For 83 minus 68, go from 68 to 70, then 70 to 83, and add the two jumps.
Multiplying by 5 is halving and multiplying by 10. For 5 times 46, halve to 23 and put a zero on it.
Multiplying by 4 is doubling twice, and by 8 is doubling three times. Doubling is the one operation almost everyone can do instantly.
Dividing by 5 is doubling and dividing by 10. For 340 divided by 5, double to 680 and drop a zero.
Choosing settings that actually help
Practise one operation at a time until it is fast, then mix. Switching between addition and division costs a moment every question, and mixing too early makes it look like your arithmetic is weak when the real cost is the switching itself.
Short durations beat long ones for building speed. Sixty seconds at full concentration teaches more than five minutes at three quarters, and the score is easier to compare across days.
Track the questions you get wrong rather than the total. A score that stops improving usually hides three or four specific facts that are still being calculated instead of recalled, and drilling only those moves the whole number.
Practise a little every day, memorise number bonds and times tables, and learn shortcuts like rounding then adjusting. Timed drills like this one build automatic recall.
Which operations can I practise?
Addition, subtraction, multiplication and division, or a mixed mode that combines all four. Pick a time limit of 30, 60 or 120 seconds.
Is this useful for students or exams?
Yes. Fast, accurate mental math helps with school tests, aptitude exams and everyday tasks. Short daily sessions work better than occasional long ones.
What tricks make mental addition and subtraction faster?
Work left to right — for 47+38, add 40+30 first, then 7+8 — because it matches how you say numbers aloud. Also learn complements: to add 9, add 10 and subtract 1, or jump to the next ten first (47+3, then +35). These two habits cover most everyday sums.
How many minutes a day should I practise mental math?
Five to ten focused minutes a day is enough for steady progress — roughly two or three timed rounds here. Spaced daily repetition builds automatic recall far better than one long weekly session, because each retrieval strengthens memory. Track your score per round and aim to beat last week, not yesterday.
Is counting on fingers a bad habit?
Not in the early stages — research on numerical development treats finger counting as a normal, even helpful, step toward number sense. It only becomes a limitation when it persists as the main strategy, since it caps speed. Timed drills like this one encourage the shift from counting to recalling facts directly.
Does mental math ability affect overall math performance?
Strongly, in one specific way: when basic facts are automatic, working memory is freed for the actual problem — setting up the equation, choosing a method, checking the result. Students who still compute 7×8 slowly spend that mental budget on arithmetic instead. Fluency doesn't replace understanding, but it removes a common bottleneck.