Chapter 2 Vocabulary Breen/Constance

Commutative Property of Addition The property which states that the order in which two numbers are added does not change the sum. Associative Property of Addition The property which states that the grouping of the addends does not change the sum. Identity Property of Addition For any number, zero plus that number is the number. equation A sentence that contains an equals sign (=), showing that two expressions are equal. subtrahend A number subtracted from another number. minuend The first number in a subtraction problem. It is the number from which another number is subtracted. variable A letter or symbol used to represent an unknown quantity. unknown An amount that has not been identified.