Adding game

This adding game will really help you sharpen your basic mathematics skills while you race against the clock and choose your difficulty level.

Basically, you have 60 or 90 seconds (master level) to see how many exercises you can get correctly. In master level, you need to type your answer.

You should use any means necessary to get the answer, such as mental math, paper and pencils.

However, I strongly recommend that you do not use a calculator!