Online math game

Mental math: solve problems in your head against the clock

Also known as: Quick Math, mental math trainer, math problems in your head

Solve addition and subtraction problems and type the answer: it’s checked automatically. A round lasts two minutes, and the problems get harder when you answer almost without mistakes. You can play 10 minutes a day without signing up.

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  • 2 minutesper round
  • 4 levelsfrom numbers up to 9 to numbers up to 400
  • No sign-up10 minutes a day
  • Progress30-day chart
What it trains

Why practice mental math

The exercise works your mental arithmetic and working memory: you have to hold the running total in your head while you add or subtract the next number. The timer sets the pace, and doing sums without paper or a calculator starts to feel natural.

In your account this game is called “Quick Math”. Once you sign up, every round is saved: you see your score, correct answers, mistakes and top level, and a 30-day chart shows how your results change.

  • You reach for a calculator for a simple sumDoing math in your head feels unfamiliar
  • You lose track when there are three numbers instead of twoThe running total slips away halfway through
  • Checking a receipt or your change takes a whileSlow arithmetic in everyday tasks
  • You want a warm-up before workTwo minutes of problems make a quick warm-up

Mental arithmetic

Addition and subtraction without paper or a calculator.

Working memory

In three-number problems you keep the running total in mind.

Speed

The faster you answer, the more problems you fit into two minutes.

Accuracy

A mistake costs a point, so rushing without checking doesn’t pay off.

Rules

How to play

  1. Start

    Press “Start”. Five problems appear on the screen and a two-minute timer begins.

  2. Answer

    Type the answer with the on-screen buttons or the number keys on your keyboard. Once you’ve typed as many digits as the correct answer has, it’s checked automatically.

  3. Score

    A correct answer earns a point and a mistake takes one away, but your score never drops below zero. If you get it wrong, the correct answer appears next to it.

  4. Level

    Problems come in sets of five. If you get 4 out of 5 right in a checkpoint set, the level goes up; with fewer, it may go down.

  5. Finish

    After two minutes the round ends. You’ll see your score, correct answers, mistakes and top level.

Play online

Mental math online

Press “Start” and type your answers. Without sign-up you get 10 minutes of play a day.

Quick Math

Solve the problems in your head. Get them almost all right and they get harder.

Free play left today without signing up: 10 min

Method

What the exercise is based on

This is classic timed mental math, like a classroom warm-up: nothing is written down, the answer comes straight from your head. Difficulty adapts to you. First come numbers up to 9, then problems with three numbers, and at the top levels numbers go up to 400.

If you want to compare as well as calculate, try “Greater or Less”: you size up two expressions and pick the bigger one. And “Making Change” moves arithmetic into a familiar situation with money.

1–9Two numbers up to 9Level 1: adding and subtracting single-digit numbers
a+b−cThree numbersLevel 2: a three-number problem with terms up to 9 and sums up to 18; keep the running total in your head
up to 400Big numbersLevels 3 and 4: numbers up to 400, first two per problem, then three; with three numbers the amount subtracted and the sum can reach 800
Who it’s for

Which ages

Adults

A short warm-up before work or study. Two minutes, and you can see how your math is going today.

Kids

Not part of the “Kids” collection: at the top levels numbers go up to 400. A good fit for school kids who add and subtract confidently in the hundreds.

60+

Part of the “60+” collection. Problems start simple, you can type digits with on-screen buttons, and difficulty rises only when you answer confidently. 60+ set

Program finder

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Answer 4 questions and we’ll put together a daily program of 5 trainers. We’ll email you the full 2-week plan.

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Questions

Frequently asked questions

How is my answer checked?

Automatically, with no Enter key: as soon as you’ve typed as many digits as the correct answer has. So work it out first, then type. You can erase a digit until the whole answer is typed.

Can I type answers on the keyboard?

Yes. Type digits on your computer keyboard; Backspace erases the last digit. On a phone you get number buttons on the screen.

Are there negative answers?

No. The problems are built so that the answer is always zero or more and has no more than three digits.

Do I need to sign up?

No, you can play 10 minutes a day right away. Free sign-up lets you keep playing, save your results, track your progress and unlock the daily workout.

Does it work on a phone?

Yes, the game runs in the browser on a phone, tablet or computer. There’s nothing to install.

Save your results and track your progress

Free sign-up: round history, a chart by skill and a daily workout of 5 exercises. No credit card needed.

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