SAN: Arithmetic Quiz!

You can enjoy mental arithmetic. Kind of calculation are the following. Arithmetic- Addition: Calculate addition- Subtraction: Calculate subtraction- Multiplication: Calculate multiplication- Division: Calculate divisionNumber- Remainder: Calculate remainder- GCD: Calculate Greatest Common Divisor- LCM: Calculate Least Common MultipleRational Number- Fraction: Find a decimal number equals to given fraction- Decimal: Find a fraction equals to given decimal number