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Math Vocabulary – Unit 7
Account balance: An amount of money that you have
or that your owe.
Ambiguous: When an expression has more than one
possible meaning.
Axis or coordinate grid: Either of the two number
lines used to form a coordinate grid. (plural:axes)
Base: a number that is raised
example, the base of 52 is 5.
to
a
power.
For
Debt: An amount subtracted from a bank balance; a
withdrawal.
Expanded notation: A way of writing a number as the
sum of values of each digit. For example 356 is 300
+ 50 + 6 in expanded notation.
Exponent: a small raised number used in exponential
notation to tell how many times the base is used as
a factor. For example, in 53, the base is 5 and the
exponent is 3 and 53 = 5 * 5 * 5 = 125. Same as
power.
Exponential
Notation:
a
way
of
representing
repeated multiplication by the same factor. For
example 23 is the exponential notation for 2 * 2 *
2. The exponent 3 tells how many times the base 2
is used as a factor.
Expression: (1) a mathematical phrase made up of
numbers,
variables,
operation
symbols,
and/or
grouping symbols. An expression does not contain
relation symbols such as =, , . (2) Either side
of an equation or inequality.
Factor: (1) Each side of two or more numbers in a
product. For example in 6 * 0.5 , 6 and 0.5 are
factors. (2) To represent a number as a product of
factors. For example, factor 21 by rewriting it as
7 * 3.
In the black: having a positive account balance;
having more money than is owed.
In the red: having a negative account
owing more money than is available.
Line graph: A graph in which
connected by line segments.
data
balance;
points
are
Negative numbers: Numbers less than zero; the
opposites of the positive numbers, commonly written
as a positive number preceeded by a – or OPP.
Negative numbers are plotted left of 0 in a
horizontal number line or below 0 in a vertical
number line.
Nested parentheses: parentheses within parentheses
in an expression. Expressions are evaluated within
the innermost parentheses outward.
Number-and-word notation: a notation consisting of
the significant digits of a number and words for
the place value. For example, 27 billion is a
number-and-word notation for 27,000,000,000.
Opposite
distance
opposite
number n
of a number n: a number that is the same
from 0 on a number line as n, but on the
side of 0. In symbols, the opposite of a
is –n.
Order of operations: Rules that tell the order in
which operation in an expression should be carried
out. The conventional order of operations is as
follows: 1) Parentheses 2) exponents 3) Multiply 4)
Divide 5) Add and 6) Subtract.
Power of ten: a number that can be written in the
form 10a , where a is a counting number; that is the
numbers 10 = 101 , 100 = 102, 1,000 = 103, and so on
, that can be written using only 10’s as factors.
Power of a number: a product of factors that are
all the same; the result of ab for any numbers a
and b. For example, 53 = 5 * 5 * 5 = 125 is read
“five to the third power of 5” because 5 is a
factor 3 times.
Scientific notation: a system for representing
numbers in which a number is written as the product
of a power of 10 and a number that is at least 1
and less than 10. Scientific notation allows you to
write large and small numbers with only a few
symbols. For example, in scientific notation,
4,300,000 is 4.3 * 106 and 0.00001 is 1 * 10 -5 .
Standard
notation:
out
most
common
way
of
representing whole numbers, integers, and decimals.
Standard
notation
is
base-10
place
value
numeration. For example, standard notation for
three hundred fifty-six is 356.
Trend: how something has changed over a period of
time.
Venn diagram: a picture that uses circles or rings
to show relationships between sets. In this
diagram, 22 + 8 = 30 girls are on the track team,
and 8 are on both the track and the basketball
teams.
22
8
30