Absolute Value
The absolute value of a number is the distance it is from zero on a number
line.

Constant
A constant is a symbol that doesn't change value.

Decimal or decimal fraction
A decimal fraction is a fraction where the denominator is a power of ten.

Denominator
The denominator is the bottom part of a fraction.

Divisor
A divisor is the number that you are going to divide something by.

Exponent
An exponent tells how many times the base of an expression is used as a
factor.

Factors
There are two components to a multiplication equation the factor and product.

Fraction
A fraction consists of a numerator and denominator.

Index
The index of a radical is the root that the radical is seeking.

LCD or Least Common Denominator
The least common denominator is the smallest positive integer that is a
multiple of the denominators.

Mixed Number
A mixed number is a number that is composed of a non zero integer and a
fraction .

Number Line
A number line is a pictorial view of all possible real numbers.

Numerator
The numerator is the top part of a fraction.

Percent
A percentage is a way of expressing a number as a fraction os 100.

Prime Number
A prime number is a number that can be divided only by one and it's self
evenly.

Proper Fraction
A proper fraction is a fraction where the denominator is larger then the
numerator.

Proportion
Two quantities are said to be proportional if they vary in such a way that
one if the quantities is a constant multiple of the other.

Ratio
A ratio is an expression that compares quantities relative to each other.

Term
A term is either a single number or variable or the product of several numbers
and or variables separated
from other terms by a '+' or "-" sign in an overall expression.

Variable
A variable is a symbol used in mathematics to represent a "something"
that does not have a fixed value or is unknown.
