One button (AC) clears your whole equation you typed in, and the other button (CE or C) clears the equation on the screen, for example, you typed in 23*4 but meant it to he 23*5, you could press the CE button to clear out the 4 and retype in the correct equation.
Yes - often there are two buttons labelled "C", and "CE". "CE" (clear entry) will delete the last number, while "C" will clear the entire calculation. Details, of course, may vary among different models of calculators.
some people are used to using the bottom right one as a calculator
Yes, You wouldn't be able to do too much with a calcultor with no buttons...
by buttons.....
12
adding
clear
AC stands for all clear on a calculator
1, 2 and + are 3 buttons.
all clear
All Clear
Clear All.