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Free (ad supported) limited functionality version of Math Mania Multiplication Pro. If you like it and want more game modes, features and NO ADS, then purchase "Math Mania Pro" and here is what you will get;
Description of the Pro (paid version) below:
Math Mania Multiplication Pro is both a Kid and Adult friendly math game. Keep your brain active and on edge with this simple, yet HD math game. The math problems come up and you have to answer them.