Calculator Unica

一個簡單的計算器，快速，方便，全屏！

Basic math calculator that supports addition, subtraction, multiplication, division, percentages, and change sign (negative numbers). Free math lessons and math homework help from basic math to algebra, geometry and beyond. Students, teachers, parents, and everyone can find solutions to their math problems instantly. A basic online calculator similar to many electronic calculators. The most simple mathematical operations: addition, subtraction, multiplication, division. This is a simplified version of the online calculator.