【實用遊戲app】Calc4|最夯免費app-綠色工廠好玩App

let's Improve your calculating ability by this app!When a formula is set, choose a correct answer from four numbers!More difficult calculation is a high score! But it will become a score in half every five seconds, I will calculate quickly and will get a high score!If "Decimal fraction" is turned ON, the formula in which a decimal is included will also be set to an answer! If the answer contains a decimal point is up 1.5 times!Those who want to take a high score, and those who want to challenge difficult calculation will try!