| mean A number representing a
set of other numbers determined by taking the sum of those numbers and dividing by the
number of them. Also called average. means
In the proportion a/b = c/d, the numbers b and c.
means-extremes property In any
proportion, the product of the means equals the product of the extremes.
meter The basic unit of length in
the metric system.
metric system of measurement A system of
measurement based on the decimal system. Also called the international system of
measurement.
mile ( mi ) A unit of length in the U.S.
system of measurement equal to 5,280 feet.
milli- A prefix meaning 1/1000.
million A word name for 1,000,000.
millionth A word name for 0.000001
or 10-6.
minuend The number a in a -
b.
mirror A line over which a figure is
reflected. Also called reflecting line.
mixed numeral A symbol consisting of a
whole number with a fraction next to it denoting the sum of those numbers.
mixed number A number written as a mixed
numeral.
Multiplication of Fractions Property For
all numbers a, b, c, and d with b are not equal to 0 and d
is not equal to 0: a/b times c/d = ac/bd.
Multiplication Property of Equation If x = y, then ax = ay.
Multiplication Property of -1 For any
number x: -1 times x = -x.
Multiplication Property of Zero For
any number x: x times 0 = 0.
multiplicative Identify Property of One
For any number n: n times 1 = 1 times n = n.
multiplicative inverse The number by
which a given number can be multiplied resulting in a product equal to 1. Also called reciprocal.
Mult-Rec Property of Division For any
numbers a, and b, with b not equal to 0: a/b = a times 1/b.
In words, dividing by b is the same as multiplying by the reciprocal of b. |
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natural number Any
one of the numbers 1, 2, 3, ... . Also called positive integer. ( Some people
include 0 as a natural number.) negative integer
Any one of the numbers -1, -2, -3, ... .
negative number A number which is
the opposite of a positive number.
nested parentheses
Parentheses which areinside parentheses.
network
A union of points (its vertices or nodes) and
segments (its arcs) connecting them. Also called graph.
node
An endpoint of an arc in a network.
n-gon A polygon with n sides.
nonagon A nine-sided polygon.
number line A line in which the
points in order correspond to numbers in order.
numerator a in the
fraction a/b.
numerical expression A symbol for a
number. |
