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