Description of Da Capo Mental Arithmetic Memorize and repeat systematically: This educational game is suitable for both children and adults. It provides training in mental arithmetic for multiplication/division (multiplication tables) and addition/subtraction from 0 to 20. The number combinations can be set any way you choose and therefore practiced systematically. Learning progress can be rummy wealth yestracked using the best player list.To keep children from switching to other mobile phone functions, a lock can be placed to keep them from leaving the application. Important: to lock or unlock, you have to trace the entire diagonal from the upper left to the lower right with your finger.

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