Matho-Sub
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 ...
Cost: $9
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Trial version
Publisher: Magical Methods Enterprises 
Descriptions
Matho-Sub:
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..
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