Welcom to TeX.SX. Please show us a minimal example beginning with \documentclass{ and ending with \end{document}. It is easier and faster for us to help you then.
– LaRiFaRiAug 26 '13 at 13:31
Maybe the xlop package will interest you. It performs arithmetic operations and it can display it like if you had written it by hand (xlop on CTAN).
– remjgAug 26 '13 at 13:46
\documentclass{and ending with\end{document}. It is easier and faster for us to help you then. – LaRiFaRi Aug 26 '13 at 13:31xloppackage will interest you. It performs arithmetic operations and it can display it like if you had written it by hand (xlop on CTAN). – remjg Aug 26 '13 at 13:46