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Algebra Vocabulary Chap. 2-3
Glencoe Chapter 2-3 selected vocabulary
40
Mathematics
8th Grade
09/03/2007

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Term
additive inverse
Definition
The number and its opposite added together to get zero
Term
coordinate
Definition
the number that corresponds to a point on a number line
Term
frequency
Definition
how often a piece of data occurs
Term
integers
Definition
the set ....-2, -1, 0, 1, 2, ....
Term
irrational number
Definition
numbers that cannot be expressed as terminating or repeating decimals
Term
line plot
Definition
a number number line labeled with a scale to include all the data with an X placed above a data point each time it occurs
Term
natural numbers
Definition
the set 1, 2, 3, ...
Term
negative number
Definition
any value less than zero
Term
odds
Definition
the ratio that compares the number of successes to failures
Term
opposites
Definition
every positive rational number and its negative pair
Term
perfect square
Definition
where the square root is a rational number
Term
positive number
Definition
any value that is greater than zero
Term
principal square root
Definition
the non-negative square root of a number
Term
probability
Definition
ratio of the number of successes to total
Term
radical sign
Definition
the square root symbol used to indicate a non negative square root
Term
rational number
Definition
the set of numbers expressed in a fraction a/b where a and b are integers and b is not equal to 0
Term
real number
Definition
the set of rational and irrational numbers
Term
simple event
Definition
a single event
Term
square root
Definition
one of two equal factors of a number
Term
stem-and-leaf plot
Definition
a system used to separate data into two numbers that are used for form a stem and a leaf
Term
whole number
Definition
the set 0, 1, 2, 3, ...
Term
complex numbers
Definition
rational, irrational, imaginary, numbers
Term
imaginary numbers
Definition
a non real number (square root of a negative number)
Term
addition property of =
Definition
if a =b then a+c = b + c
Term
division prop of =
Definition
with c not equal to 0, if a=b, then a/c = b/c
Term
extremes
Definition
in the ration a/b = c/d, a and d are the extremes
Term
formula
Definition
an equation that states the rule for the relationship between certain quantities
Term
identity
Definition
an equation that is true for every value of the variable
Term
means
Definition
the opposite of the extremes
Term
multiplication prop of =
Definition
if a=b, then ac = bc
Term
multi-step equation
Definition
an equation with one or more operation
Term
percent of change
Definition
when an increase or decrease is expressed by a %
Term
percent of decrease
Definition
the ratio of an amount of decrease to the previous amount expressed as a %
Term
percent of increase
Definition
the ratio of an amount of increase to the previous amount expressed as a %
Term
proportion
Definition
an equation of the form a/b = c/d stating that two ratios are equivalent
Term
rate
Definition
the ratio of two measurements having different units of measure
Term
ratio
Definition
a comparison of two numbers by division
Term
scale
Definition
a ratio or rate used when making a model of something that is to large or to small to be shown at actual size
Term
subtraction prop of =
Definition
when a=b, then a-c = b-c
Term
weighted average
Definition
the sum of the product of the number of units and the value per unit divided by the sum of the number of units represented by m
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