Scratch cat tells you everything you need to know for this except for this: If the answer is a decimal, round it to the nearest 1. The functions in this project are explained in the Notes and Credits section. I suggest you read them. Also, report any bugs that you find,
Sum of means add the two numbers. Difference of means subtract the two numbers. Product of means multiply the two numbers. Quotient of means divide the two numbers. Absolute value of means find the absolute value of the number given. Square root of means find the square root of the number given. Absolute value is the positive form of the number (ex: absolute value of -13 is 13. Absolute value of 7 is 7) Square root is the number that has to be multiplied by itself to equal the number given. (Ex. Square root of 9 is 3 because 3 x 3 is 9). This function can be tricky which is why I won't consider using a calculator for it cheating as long as the answer is a decimal and not a whole number.