38 terms

# Algebra 1A, Chapters 1 and 2.

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Numerical expression
expression containing numbers and operations
Inverse operations
operations which undo each other
Identity Property
14 + 0 = 14 or 23 * 1 = 23
Perimeter
distance around any polygon
Set
a well defined collection of elements
Rational
repeating and terminating numbers
Equation
mathematical expressions separated by equal signs
Variable
a letter used to represent a number
Whole Numbers
The set of numbers { 0, 1, 2, 3, ...}
Opposites
two numbers whose sum is zero
Absolute Value
the distance a number is from zero on the number line
Real Numbers
all rational and irrational numbers
Like Terms
terms whose variable parts are exactly the same
Constant
a term with no variable factor
Open Sentence
an equation containing a variable
Algebraic Expression
an expression containing operations, numbers and variables
Area
the number of square units in a figure
Associative Property
property where what is in parentheses changes
Integers
The set of numbers { ...-2, -1, 0, 1, 2,....}
Subset
a set that consists of elements from a given set
Perfect Squares
a number whose square roots are integers
Commutative Property
Property where order does not matter
Irrational
non-repeating or non-terminating numbers
Square Root
a number "a" is this of a number "b" if a squared = b.
Natural Numbers
The set of numbers { 1, 2, 3, 4,....}
Power
the base and exponent of an expression of the form "a" raised to the "n."
Evaluate
to substitute a given number for each variable and simplify
Base
a number that is multiplied repeatedly
Order of Operations
steps used to simplify a mathematical expression
Exponent
a number that shows repeated multiplication
Numerator
the number above the fraction bar
Distributive Property
property which allows you to get rid of parentheses