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Mental math speed test

Twelve problems, one clock, one score. A benchmark you can repeat weekly to see whether practice is actually moving anything.

4 rows × 2 digits, add & subtract
About 5 min
Free, no account

Sample problems

Real problems from this drill, with answers. Nothing to install, no account, no email — work them on paper, on a physical abacus, or in your head.

1
68
+ 93
+ 14
+ 68
?
2
62
+ 72
− 56
− 18
?
3
51
+ 67
+ 37
+ 49
?
4
82
+ 55
− 52
− 10
?
5
48
+ 11
− 40
+ 77
?
6
32
+ 20
+ 54
+ 75
?
7
73
− 44
− 22
+ 26
?
8
25
− 13
+ 72
− 23
?
9
63
− 62
+ 54
+ 58
?
10
58
− 54
+ 52
+ 27
?
11
94
+ 84
+ 90
+ 25
?
12
89
+ 60
− 47
+ 65
?

Full answer key

68 + 93 + 14 + 68 = 243
62 + 72 − 56 − 18 = 60
51 + 67 + 37 + 49 = 204
82 + 55 − 52 − 10 = 75
48 + 11 − 40 + 77 = 96
32 + 20 + 54 + 75 = 181
73 − 44 − 22 + 26 = 33
25 − 13 + 72 − 23 = 61
63 − 62 + 54 + 58 = 113
58 − 54 + 52 + 27 = 83
94 + 84 + 90 + 25 = 293
89 + 60 − 47 + 65 = 167

This page is one drill. The app is the whole programme.

Kani Math is a full mental-arithmetic course, not a single exercise. Free to start, no signup, and it runs on the web, Android and iPhone.

It also delivers the numbers for you — flashed on screen or read aloud, with the speed, digit count and number of rows under your control. That is the one thing a printed page cannot do.

✓Nine levels, from the first bead to division
✓Four timed sprints and two practice exams, with leaderboards
✓Flash, listening and abacus drills at a speed you set
✓Versus matches against friends or the computer
✓Say your answers out loud — the app listens and marks them
✓Streaks, coins and badges, a teacher view, and a parent dashboard with Premium

Nine levels, one skill at a time.

Math Sprint — solve against the clock.

A weekly progress view for parents.

Want to stay here? The demo further down runs right on this page.

Launch App →Try the demo ↓

Get the app

Download on theApp Store Get it onGoogle Play In your browserLaunch App

Practise it now

A live drill of the same shape, in your browser, with a virtual soroban and instant marking.

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Loads a full interactive drill right here on the page. It never asks who you are.

No signup. Nothing saved unless you ask.

Explore the free virtual abacus →How to use an abacus →Mental Math Drill →

About this drill

Practice without measurement drifts. A learner can put in twenty minutes a day for months and have no idea whether they are getting faster, because subjective effort feels identical at every level. A fixed test — same length, same difficulty, same format — turns that into a number.

Treat the score as a trend line, not a grade. Single results bounce around by ten or fifteen percent for reasons that have nothing to do with skill: sleep, time of day, whether the previous problem went badly. Four weeks of readings tell you something; one does not.

How to practise it

1Run it at the same time of day each week, on the same device.
2Do not warm up on the test itself — warm up on a different drill.
3Record both the score and the time; either alone is misleading.
4Change one variable at a time if you want to know what helped.

Questions

What is a good score?

There is no universal benchmark worth quoting — problem width, row count and answer format all change the number. Compare yourself to your own previous result, not to a table.

Should I prioritise speed or accuracy?

Accuracy, always. Speed built on a 70% accuracy base collapses the moment problems get harder; speed built on 100% keeps scaling.

How often should we test?

Weekly at most. Testing more often measures noise, and it eats practice time that would actually move the number.

Does this work as a placement test?

Not really — it measures speed at one fixed difficulty. The placement exam adapts its difficulty and is the right tool for finding a starting level.

Learn the techniqueMental abacus (anzan)Walk through it on the beads →