Algebra 1A, Chapters 1 and 2.

STUDY
PLAY
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,....}
Radicand
the expression under the radical
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
Radical
an expression made up of a radical symbol and radicand
Terms
separated by plus and minus signs
Reciprocals
two numbers whose product is one
Simplify
to put an expression into simplest form
Coefficient
the number in front of a variable