The skill of adding numbers quickly in your head is useful in many situations.

Use the applet below to speed up your mental arithmetic. See how fast you can get with 100% accuracy. You might find it faster to turn on NumLock on your key board and use the right hand number pad if available. Turn on your speakers if you have them. Click begin and type each answer followed by the Enter key. You will get 10 questions.

Hold down Shift and click the Reload button on your browser to try again.

When you get fast and perfect every time with this one, you will want to go on to something harder.

Applet created by Warren Code and Keith Taylor.