Mathematical games to speed up the mind with additions and subtractions.
Guess the number that is missing in the operation.
Get over 10 levels of difficulty.
Perfect for all ages.
For any question or contribution, contact: jmartin.desarrollo@gmail.com
Guess the number that is missing in the operation.
Get over 10 levels of difficulty.
Perfect for all ages.
For any question or contribution, contact: jmartin.desarrollo@gmail.com
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