Memory Game Expressions and EquationsOnline version Vocabulary surrounding mathematical expressions and equations. by Alyssa Miller an operation that "undoes" another operation Algebraic Term A combination of one or more algebraic terms with NO equal sign. Addition Equation Constant Algebraic Expression A mathematical term that contains a variable. Subtraction The inverse operation of division. Has algebraic terms linked with an equal sign. The inverse operation of addition. A term that has NO variable. Inverse Operation Multiplication Division The inverse operation of subtraction The inverse operation of multiplication.