Enjoy the one hundred squares calculation! From top to bottom, you make answers in squares. As soon as you make answer, it is scored. When you fill all squares by answers, your answer time is recorded. Please enjoy it! ■4 modes: - Addition - Subtraction - Multiplication - 4 operations(Addition, Subtraction, Multiplication, Division) ■4 keyboard type: - Phone - Calculator ■Graph mode: - You can confirm the history of your records. ■Limited answer mode (more than 0 only) - In only subtractio