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# Vocab Algebra

### Terms for Holt Middle School Math Course 2

numerical expression made up of numbers and operations
order of operations rules to follow
PEMDAS parentheses exponents multiply divide add subtract
multiple the product of that number and a whole number
least common multiple(LCM) a number that is the common multiple with the least value
rational number numbers that can be written as fractions, with integers for numerators and denominator.
varialbe when a letter represents a number that can vary
algebraic expression consists of one or more variables and usually contains constants and operations
constant a number that cannot change
evaluate substitute a number for the variable
equation is a mathematical statement that two expressions are equal in value
solution a value of the variable that makes the statement true
greatest common factor (GCF) the greatest whole number that divides evenly into each number
prime number a whole number greater than 1 that has exactly two factors--1 and itself
composite number a whole number that has more than two factors
exponent tells how many times to use the base as a factor