Arithmetic Subtraction: Math Game

練習算術減法，提高心理數學技能。數學難題

Practice arithmetic subtraction and improve your mental math skills.

Connect 3 or more numbers so that the result of their subtraction is equal to one of the top numbers. You can connect numbers horizontally, vertically or diagonally. The longer the series of the connected numbers, the bigger the score you can get. You can undo the selection by getting back to the previous numbers.

You have 60 seconds to match each of the top numbers. There is a progress bar that shows the remaining time. The longer the time passes without matching the required numbers, the top numbers gets more red and the progress bar increases.

It’s game over when the time of any of the target numbers ends.

Play, enjoy and have fun !

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