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variable
a symbol, usually a letter, which represents one or more numbers
numerical expression
a mathematical phrase that contains numbers and operations
algebratic expression
a mathematical phrase that contains one or more variables
consecutive
to follow one another in order
diagram
a drawing that is included with a math problem
pattern
the same type of change between any two shapes or numbers
open sentence
an equation that contains one or two more variables
equation
a statement that 2 expressions are equal
properties of equality
logical rules that allow you to balance, manipulate, and solve equations
inverse operations
operations that undo each other
absolute value
the distance of any number x, written lxl, represents the distance from any number x to 0 on the number line