###
variable

a letter which stands for a number

###
expression

any combination of numbers, variables,operations and grouping symbols

###
value

the number that a variable stands for

###
evaluate

to find the value of an expression when the value of the variables are known

###
substitute

to replace a variable, term, or expression with an equivalent variable, term or expression

###
power

repeated multiplication by the same factor

###
base

the repeated factor in a power

###
exponent

the number of times that the base is repeated

###
area of a square

s=side length

A=s squared

units will be squared

###
volume of a cube

s=side length

v=s cubed

units will be cubed

###
order of operations

Parentheses

Exponents

Multiplication

Division

Addition

Subtractions

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integers

the set of positive and negative, whole numbers, also zero

###
absolute value

the distance between a number and zero on the number line

###
additive inverses/opposites

-numbers with same absolute value but different signs

-when added together, their sum is zero

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inverse property of addition

a+(-a)=0

any number plus its opposite equals zero

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definition of subtraction

a-b=a+(-b)

subtraction is the same as adding the opposite of a number

###
multiplication property of one

-1*a=-a

any number multiplied by negative one equals its opposite

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