## This is free version. If you like this app, please use pay version ##
Link is here

It is an application that practices one-digit addition, multiplication (Multiplication table), subtraction, division, which is the basis of calculation.

It will ask you 81 questions. You have to answer two choices. If you think the answer is correct, you tap 'correct' button. If you think the answer is incorrect, you tap 'incorrect' button. You can answer simply.

When all problems are answered correctly, it will record the time.Aim for self-best update!

Up to 4 people can register data. Let's compete for time with family and friends!

For improving the scholastic ability of children.
For increasing work productivity of adult. Calculation is also essential for shopping and cooking.
Grandpa or grandma may also be effective in preventing blurring.

The result is sent to the server.
You can see the rank of computing power.

Have fun!