| common denominator | a number that is a multiple of all of the denominators in a group of fractions |
| Distributive Property | states that the product of a number and a sum equals the sum of the individual products of the number and the addends: for all real numbers a, b, and c, a(b + c) = ab + ac |
| formula | a type of equation—usually reserved for multi-variable equations that describe a well-known or often repeated calculation |
| Inverse Operations | operations that undo or cancel one another, such as addition/subtraction and multiplication/division |
| Property of Equality | states that the equality of an equation is maintained when both sides have the same value added, subtracted, multiplied, or divided |
| variable | a symbol that represents an unknown value |