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