**6 - 8**
**
****A**

**
acute angle
**

**
acute triangle
**

**
add
**

**
addend
**

**
addition
**

**
addition sentence
**

**
adjacent angles
**

**
after
**

**
algebraic expression
**

**
algebraic operating system (AOS)
**

**
angle
**

**
area
**

**
array
**

**
associative property of addition
**

**
associative property of multiplication
**

**
average
**

**
axis (plural axes)
**

**
****B**

**
balance
**

**
bar graph
**

**
base (in a number system)
**

**
base (in plane geometry)
**

**
base (in solid geometry)
**

**
base unit
**

**
before
**

**
benchmark number
**

**
between
**

**
biased sample
**

**
billion
**

**
bisect
**

**
****C**

**
calendar
**

**
capacity
**

**
cardinal number
**

**
cell
**

**
center (of a circle)
**

**
centimeter (cm)
**

**
certain
**

**
chord
**

**
circle
**

**
circle graph
**

**
circumference
**

**
closed figure
**

**
clustering
**

**
common factor (in arithmetic)
**

**
common fraction
**

**
common multiple
**

**
commutative property of addition
**

**
commutative property of multiplication
**

**
compass
**

**
compatible numbers
**

**
complementary angles
**

**
composite number
**

**
compound event
**

**
cone
**

**
congruent figures
**

**
congruent polygons
**

**
convenience sample
**

**
coordinate plane
**

**
coordinates
**

**
corner
**

**
count back
**

**
count on
**

**
cross multiply (cross products)
**

**
cube (in geometry)
**

**
cubic unit
**

**
cumulative frequency
**

**
cup (c)
**

**
customary measurement system
**

**
cylinder
**

**
****D**

**
data
**

**
decimal
**

**
decimal fraction
**

**
decimal number system
**

**
decimal point
**

**
decimeter
**

**
degree (°)
**

**
degrees Celsius (°C)
**

**
degrees Fahrenheit (°F)
**

**
denominator
**

**
dependent event
**

**
diameter of a circle
**

**
diameter of a sphere
**

**
difference
**

**
digit
**

**
dime
**

**
dimension (in geometry)
**

**
discount
**

**
distributive property of multiplication over addition
**

**
divide
**

**
dividend
**

**
divisible
**

**
division
**

**
divisor
**

**
dodecahedron
**

**
dollar
**

**
double
**

**
double bar graph
**

**
double minus one
**

**
double plus one
**

**
****E**

**
edge
**

**
elapsed time
**

**
equal
**

**
equal groups
**

**
equal parts
**

**
equally likely
**

**
equation
**

**
equilateral triangle
**

**
equivalent
**

**
equivalent fractions
**

**
equivalent ratios
**

**
estimate
**

**
evaluate
**

**
even number
**

**
event
**

**
expanded form
**

**
experiment
**

**
exponent
**

**
expression
**

**
****F**

**
face
**

**
fact family
**

**
factor (in arithmetic)
**

**
factor tree
**

**
fair
**

**
fewer
**

**
Fibonacci sequence
**

**
flip
**

**
foot (ft)
**

**
formula
**

**
fraction
**

**
frequency
**

**
frequency table
**

**
****G**

**
gallon (gal)
**

**
golden ratio
**

**
golden rectangle
**

**
gram (g)
**

**
greater than (>)
**

**
greatest common factor (GCF)
**

**
grid
**

**
grouping property of addition
**

**
grouping property of multiplication
**

**
****H**

**
half-dollar
**

**
half-hour
**

**
height
**

**
hexagon
**

**
histogram
**

**
horizontal
**

**
horizontal bar graph
**

**
hour
**

**
hour hand
**

**
hundred
**

**
hundredth
**

**
****I**

**
identity property of one
**

**
identity property of zero
**

**
impossible
**

**
inch (in.)
**

**
independent event
**

**
indirect measurement
**

**
inequality
**

**
inside
**

**
integer
**

**
intersecting lines
**

**
interval
**

**
inverse operations (opposite operations)
**

**
isosceles triangle
**

**
****K**

**
key
**

**
kilogram (kg)
**

**
kiloliter (kL)
**

**
kilometer (km)
**

**
****L**

**
lateral face
**

**
least common denominator (LCD)
**

**
least common multiple (LCM)
**

**
less than (<)
**

**
line
**

**
line graph
**

**
line segment
**

**
line symmetry
**

**
liter (L)
**

**
lower extreme
**

**
****M**

**
map scale
**

**
mean (average)
**

**
median
**

**
meter (m)
**

**
metric system
**

**
mile (mi)
**

**
milligram (mg)
**

**
milliliter (mL)
**

**
millimeter (mm)
**

**
minus sign
**

**
minute (min)
**

**
minute hand
**

**
mixed decimal
**

**
mixed number
**

**
mode
**

**
more than
**

**
multiple
**

**
multiple-bar graph
**

**
multiple-line graph
**

**
multiplication
**

**
multiplication sentence
**

**
multiply
**

**
****N**

**
negative integer
**

**
negative number
**

**
net (in geometry)
**

**
nickel
**

**
number line
**

**
number sentence
**

**
numerator
**

**
numerical expression
**

**
****O**

**
obtuse angle
**

**
obtuse triangle
**

**
octagon
**

**
octahedron
**

**
odd number
**

**
on
**

**
one-dimensional
**

**
ones
**

**
open figure
**

**
opposite operations
**

**
opposites
**

**
order of operations
**

**
order property of multiplication
**

**
ordered pair
**

**
ordinal numbers
**

**
origin
**

**
ounce (oz)
**

**
outcomes
**

**
outside
**

**
****P**

**
parallel lines
**

**
parallelogram
**

**
partial product
**

**
pattern
**

**
penny
**

**
pentagon
**

**
percentage
**

**
perimeter
**

**
period
**

**
perpendicular lines
**

**
pi
**

**
pictogram
**

**
pie chart
**

**
pint (pt)
**

**
place value
**

**
plane
**

**
plane figure
**

**
plus sign
**

**
point
**

**
point of rotation
**

**
point symmetry
**

**
polygon
**

**
polyhedron
**

**
positive integer
**

**
positive number
**

**
pound (lb)
**

**
precision
**

**
predict
**

**
prediction
**

**
prime factorization
**

**
prime number
**

**
prism
**

**
probability
**

**
product
**

**
property of one for multiplication
**

**
property of zero
**

**
proportion
**

**
protractor
**

**
pyramid
**

**
****Q**

**
quadrant
**

**
quadrilateral
**

**
quart (qt)
**

**
quarter
**

**
quotient
**

**
****R**

**
radius (of a circle)
**

**
random sampling
**

**
range
**

**
rate
**

**
ratio
**

**
rational number
**

**
ray
**

**
reciprocal
**

**
rectangle
**

**
rectangular prism
**

**
reflection (flip)
**

**
regrouping
**

**
regular polygon
**

**
relation
**

**
remainder
**

**
repeating decimal
**

**
result
**

**
rhombus
**

**
right angle
**

**
right triangle
**

**
rotation
**

**
rotational symmetry
**

**
rounding
**

**
****S**

**
sample
**

**
sample space
**

**
scale
**

**
scale drawing
**

**
scalene triangle
**

**
scientific notation
**

**
sequence (progression)
**

**
side
**

**
simple interest
**

**
simplest form
**

**
skip count
**

**
slide
**

**
solid figure
**

**
solution
**

**
solve
**

**
sphere
**

**
square (in geometry)
**

**
square number
**

**
square pyramid
**

**
square root
**

**
square unit
**

**
standard form
**

**
stem-and-leaf plot
**

**
straight angle
**

**
subtract
**

**
subtraction
**

**
subtraction sentence
**

**
sum
**

**
supplementary angles
**

**
surface area
**

**
survey
**

**
symmetry
**

**
****T**

**
table
**

**
tally marks
**

**
tally table
**

**
tangram
**

**
temperature
**

**
tens
**

**
tenth
**

**
term
**

**
terminating decimal
**

**
tessellation
**

**
thousandth
**

**
three-dimensional
**

**
ton (t)
**

**
transformation (in geometry)
**

**
translation (slide)
**

**
trapezoid
**

**
tree diagram
**

**
triangle
**

**
triangular number
**

**
two-dimensional
**

**
****U**

**
unit fraction
**

**
unlike fractions
**

**
upper extreme
**

**
****V**

**
variable
**

**
Venn diagram
**

**
vertex (in plane geometry)
**

**
vertex (in solid geometry)
**

**
vertical
**

**
vertical angles
**

**
vertical bar graph
**

**
volume
**

**
****W**

**
week
**

**
written form
**

**
****X**

**
x-axis
**

**
x-coordinate
**

**
****Y**

**
y-axis
**

**
y-coordinate
**

**
yard (yd)
**

**
****Z**

**
zero
**

**
zero property of addition
**

**
zero property of multiplication
**

**
**