Calculate add or subtract a single digit, it is arithmetic brain training app.
Calculate add or subtract a single digit coming out in an optimal continuous in brain training, is a brain training app arithmetic.
★ Ideal for brain training ★
You do not need a difficult calculation because only addition and subtraction , but every single number or symbol + or - symbol will flash continuously. It is the perfect app to brain training it is necessary to assemble the formula in storage at the beginning it .
★ issue coming out in random every time ★
It is up to Level 4 addition and subtraction up to level 3 addition levels , but the problem will change at random each time at the same level as tired not come . There is also a simple matter if there is a problem difficult at the same level .
★ in some free time ★
It is recommended to the brain training to some free time because it is possible in a few seconds per question .
★ from a child to an adult ★
I want to brain training as an exercise of arithmetic , since the difficult level 3 or later elementary school and began to learn the formulas and math level 1 of the addition is addition of two numbers of one digit , level 2 , so addition of three numbers I can take advantage of a wide range of adults .
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