M
Mass
The measure of the amount of matter an object contains.
Mean
The value found by dividing the sum of a group of
numbers by the number of numbers in the group.
Also called average.
Means
of a proportion The
second and third terms of a proportion.
Measure
of central tendency A number used to represent all the numbers in a set of
data. Three such measures are the mean, the median, and the mode
Median
The number that falls in the middle when data are listed
from least to greatest. If the
number of data is even, the median is the mean of the two middle
Meter The
unit of measure for length in the metric system
Metric system A system of measures based on powers of ten
Midpoint The
point of a segment that divides it into two congruent segments.
Mixed number A
whole number plus a proper fraction.
Mode The number
that occurs most often in a set of data.
Multiple
A multiple of a whole number is the product of that number and any whole
number
Multiplicand
The second factor in a multiplication problem
Multiplicative
inverse Two numbers are said to be multiplicative inverses of each other if
their product is one
Multiplier
The first factor in a multiplication problem
n
, n¸1
= n
n,
0 x n= n x 0=0
n,
n + 0 =0 + n
n,1
x n = n x 1 = n