Do you know the calculator of optimal adder method for an accounting calculation? Try it on Android you always carry around. 【Feature】 - Sound effects (On/Off) - Display switching function digit after the decimal point (FULL · 0 ~ 6 digits) - The (up-truncation Ri rounded-off) Rounding switching function - 17 Number of significant digits - Always display "GT:Grand Total" - Always display "MR:Memory" - BS:BackSpace function - Android6:Image Button , Android4 ~ 5.1:Flat Button 【How to use an adder calculator】 ”(10×10)+(5×5)-(6×5)=95” 10 [×] 10 [+=] 5 [×] 5 [+=] 6 [×] 5 [-] [GT] （10×10）Add（5×5）Add（6×5）Pull % Calculation example : 500 + (500 × 12%) = 560 500 [+=] 12 [%] [+=]