what is the answer to this question 98+78
There is a calculator on the home page. :)
BUT
since the last 2 digits are 8 and 8 and 8+8=16, The LAST digit of the sum will be 6
$${\mathtt{98}}{\mathtt{\,\small\textbf+\,}}{\mathtt{78}} = {\mathtt{176}} = \tiny\text{Error: }$$