A
acute angle
add
addend
addition
addition sentence
after
angle
area
array
average
B
balance
bar graph
base unit
before
benchmark number
between
C
calendar
capacity
cardinal number
cell
centimeter (cm)
certain
circle
circle graph
closed figure
cone
congruent figures
corner
count back
count on
cube (in geometry)
cumulative frequency
cup (c)
cylinder
D
data
decimal
decimal fraction
decimal number system
decimal point
decimeter
degree (°)
degrees Celsius (°C)
degrees Fahrenheit (°F)
denominator
diameter of a circle
difference
digit
dime
dimension (in geometry)
divide
dividend
division
divisor
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
estimate
even number
event
expanded form
experiment
expression
F
face
fact family
factor (in arithmetic)
factor tree
fair
fewer
flip
foot (ft)
fraction
frequency
frequency table
G
gallon (gal)
gram (g)
greater than (>)
grid
grouping property of addition
grouping property of multiplication
H
half-dollar
half-hour
hexagon
horizontal
horizontal bar graph
hour
hour hand
hundred
hundredth
I
impossible
inch (in.)
inside
intersecting lines
interval
inverse operations (opposite operations)
isosceles triangle
K
key
kilogram (kg)
L
less than (<)
line
line graph
line segment
line symmetry
liter (L)
M
mean (average)
median
meter (m)
mile (mi)
milliliter (mL)
minus sign
minute (min)
minute hand
mixed decimal
mixed number
mode
more than
multiple
multiplication
multiplication sentence
multiply
N
net (in geometry)
nickel
number line
number sentence
numerator
O
obtuse angle
octagon
odd number
on
one-dimensional
ones
open figure
opposite operations
opposites
order property of multiplication
ordered pair
ordinal numbers
ounce (oz)
outcomes
outside
P
parallel lines
parallelogram
partial product
pattern
penny
pentagon
perimeter
period
perpendicular lines
pictogram
pie chart
pint (pt)
place value
plane
plane figure
plus sign
point
point symmetry
polygon
pound (lb)
predict
probability
product
property of one for multiplication
pyramid
Q
quadrilateral
quart (qt)
quarter
quotient
R
radius (of a circle)
range
ray
rectangle
rectangular prism
reflection (flip)
regrouping
remainder
result
rhombus
right angle
rotation
rounding
S
scale
scalene triangle
side
simplest form
skip count
slide
solid figure
sphere
square (in geometry)
square number
square pyramid
square unit
standard form
stem-and-leaf plot
subtract
subtraction
subtraction sentence
sum
survey
symmetry
T
table
tally marks
tally table
tangram
temperature
tens
tenth
tessellation
three-dimensional
ton (t)
transformation (in geometry)
translation (slide)
trapezoid
tree diagram
triangle
two-dimensional
U
unit fraction
V
variable
Venn diagram
vertex (in plane geometry)
vertex (in solid geometry)
vertical
vertical bar graph
volume
W
week
written form
X
x-coordinate
Y
y-coordinate
yard (yd)
Z
zero
zero property of addition
zero property of multiplication