“Sum” means addition. The sum of 5 and 7 is 12, because 5+7=12.
“Difference” means subtraction. The difference between 12 and 7 is 5, because 12-7=5.
“Product” means multiplication. The product of 3 and 4 is 12, because 3x4=12.
“Quotient” means division. The quotien of 12 and 3 is 4, because 12÷3=4.