Mental math speed drill
A mental math speed drill is a timed run of quick arithmetic: answer as many problems as you can before the clock ends. Type the answer and the next problem appears. Classic mode mixes +, −, × and ÷ for 120 seconds; 40 right in Classic is one answer every 3 seconds.
Do it in your head: Make ten
- Take the bigger number and ask how much it needs to reach 10.
- Take that much away from the smaller number.
- The answer is 10 plus what is left.
The presets
| Preset | What comes up | Time |
|---|---|---|
| Classic | +, −, × and ÷ | 2 minutes |
| Business % | percents of round amounts | 2 minutes |
| Squares | 2² to 30² | 60 seconds |
| 80 in 8 | 80 questions, with decimals | 8 minutes |
That’s the idea. Keep going: 4 warm-up problems, no sign-up →
Learn it properly: Small facts →
Questions
How is the score counted?
Your score is the number of right answers before time runs out. A wrong answer costs nothing: fix it and keep going, or press Skip. Your results list what you skipped.
What are the presets?
Classic: +, −, × and ÷ for 120 seconds (addition 2–100, times tables to 12). Business %: percents of round amounts, like 15% of 240. Squares: 2² to 30² for 60 seconds. 80 in 8: 80 questions in 8 minutes, with decimals.
Is my score saved?
No. The drill runs in your browser and sends nothing anywhere. Share your score if you want to keep it.
How do I get faster at mental math?
Learn a few techniques, like making ten or splitting a product into tens and ones, then practice a little every day. Speed comes from not having to think about the method.
Is this like Zetamac?
It uses the same classic ranges (addition 2–100, multiplication 2–12 × 2–100, with subtraction and division as their reverse), so scores are roughly comparable. It is not affiliated with Zetamac.