| The objective of this software is to improve Mental Subtraction. After a regular practice on Subtraction software your kid's calculation speed should increase 10 to 15 times.
MATHO-Sub software has been divided in three levels viz. Beginner, Medium & Expert. In each level you would find three speeds viz. slow, medium & fast. You can even vary the motion of the falling numbers in two ways viz. top to bottom & random.. | 
![Matho-Sub screenshot [Click to enlarge]](http://godmoon.com/S/Matho-Sub.gif)
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