암산 도사

The basis of mathematics is mental arithmetic. If the mental arithmetic speed is slow, the problem solving time increases as the grade goes up, so you cannot solve all the problems in time, and the situation that you cannot solve will be repeated. So, in the end, it gives you a glimpse into giving up math. I think that if you improve your mental arithmetic skills from the lower grades of elementary school or kindergarten, you will gain confidence in math and your grades will go up.

In the practice area, we include a complementary practice for basic calculations such as 5's complement, 10's complement, and subtraction's complement.
It allows you to practice multiplication of multiplication tables and 19 steps.
In the operation corner of addition subtraction
Step 1 is to solve the problem of single digit + single digit
Step 2 solves the problem of two digits +,-
Step 3 solves the problem of two digits + two digits
Step 4 prepared to solve the flashcard form problem of the +-mixed problem.
And since we have mixed card problems of +, -, x, ÷ and mixed flash operation
It will be of great help to students who practice and to the general public.

There is a function to save the score, so it displays the highest score you have recorded, and you can try to update your highest score. We hope this app can help improve mental arithmetic skills for adults as well as children.