#004 Calculator — Daily UI Challenge

4th day of the Daily UI Challenge.
I try to challenge myself by using an unfamiliar color scheme.
This is my first-time design calculator interface.

As I do some little research, I found that there're some pains about using the calculator app which is those confused clear buttons (clear all/clear entry/backspace) and the hidden operator states.

So I try to improve both things in my design, separate and show all clear buttons, hide rarely-used operations and show states of operation.