100MathCalc is the App for calculation training using "100masu-keisan" method."100masu-keisan" is method of learning through repetition conceived by Kageyama Hideo, which involves multiplying and other calculations carried out on a 10-by-10 grid of numbers (lit: hundred square calculations)- Support "Addition","Subtraction","Multiplication".- You can show graph of time records. Your child can feel his/her own capacity, it encourages his/her motivation.