Math vocabulary quiz – sum or difference. In this quiz, children will learn new words related to addition and subtraction. For example, in the following problem, 4 + 5 = 9, the answer 9 is the sum. In the following problem: 5 – 4 = 1, the answer 1 is the difference. Hence children will be presented with problems in which they will be required to tell if the answer is the sum or the difference. This is an introductory math topic for children in kindergarten and 1st grades to use to review some quick math facts. Teachers and parents will find this resource useful for their kids.