100 ドリル
This application help you to do standard calculation practice.
Numbers of 0 to 9 are displayed randomly on the upper left of the 10 × 10 table.
You fill a right number at each crossing square on the table follow an instruction of calculation method (addition, subtraction, multiplication etc).
One practice is very easy. However, doing this exercise everyday will reinforce your concentration and calculation capasity.
I wish you good at calculating.