A notation that uses an exponential
expression to designate a number. Writing
a number to show the value of each digit.
(412=4x100+1x10+2x1)

A location on a line or in space. A
mathematical point has no size.

of a fraction, it is the inverted form of the
fraction
4/3 is 3/4

the sum of a set of quantities divided by
the number of the quantities in the set

To add or subtract fractions whose denominators are
equal, the numerators are added or subtracted as
indicated by the + or - signs, and the result is recorded
over the same denominator.

2 operations are inverse operations if one
operation will "undo" the other operation.
multiplication and division are inverse:
subtraction and addition are inverse

a section or line. a part of a line

To evaluate an algebraic expression
means to find the value of the
expression when the variable is replaced
by a given number.

he average of a set of numbers.

A prime number is a whole
number greater than 1 whose only whole number factors
are 1 and the number itself. (2, 3, 5, 7, 11, 13...)

A number designated by a horizontal
arrangement of digits using a decimal
point to define the place values of the
digits.

A half-line. A ray begins at one point and
continues without end on a straight path
through another point.

A letter used to represent a number that
has not been designated.

The number that appears most often in a
set of numbers.

The denominator and numerator of a fraction can be
multiplied or divided by the same number (except 0O
without changing the value of the fraction.

A power of 10 is any of the integer powers
of the number ten; in other words, ten
multiplied by itself a certain number of
times

of a flat geometric figure, the distance
around the figure

A comparison of the magnitudes of 2
numbers. The ratio of a to b is a/b.

The middle number when a set of numbers
is arranged in order from the least to the
greatest.

2--even
3--sum of digits is divisible by 3
5--ends in 5 or 0
10--ends in 0

Numerator is the top of a number in a fraction
Denominator is the bottom number in a fraction (how
many parts in the whole) treat it like a
measurement label

1/2 b * h
L * W

A fraction of denominate numbers whose
value is 1.

The difference between the lowest and
highest values. In {4, 6, 9, 3, 7} the lowest
value is 3, and the highest is 9, so the
range is 9 − 3 = 6

: kilo, hecto, deka, deci,
centi, milli
1000, 100, 10, 1/10, 1/100, 1/1000