A

acute angle

acute triangle

add

addend

addition

addition sentence

after

angle

area

array

associative property of addition

associative property of multiplication

average

B

balance

bar graph

base (in a number system)

base (in plane geometry)

base unit

before

benchmark number

between

billion

C

calendar

capacity

cardinal number

cell

centimeter (cm)

certain

chord

circle

circle graph

circumference

closed figure

common factor (in arithmetic)

common fraction

common multiple

commutative property of addition

commutative property of multiplication

compass

compatible numbers

composite number

cone

congruent figures

coordinate plane

coordinates

corner

count back

count on

cube (in geometry)

cubic unit

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

diameter of a sphere

difference

digit

dime

dimension (in geometry)

distributive property of multiplication over addition

divide

dividend

divisible

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

equivalent ratios

estimate

even number

event

expanded form

experiment

exponent

expression

F

face

fact family

factor (in arithmetic)

factor tree

fair

fewer

flip

foot (ft)

formula

fraction

frequency

frequency table

G

gallon (gal)

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

impossible

inch (in.)

inequality

inside

integer

intersecting lines

interval

inverse operations (opposite operations)

isosceles triangle

K

key

kilogram (kg)

kiloliter (kL)

kilometer (km)

L

least common denominator (LCD)

least common multiple (LCM)

less than (<)

line

line graph

line segment

line symmetry

liter (L)

M

map scale

mean (average)

median

meter (m)

mile (mi)

milligram (mg)

milliliter (mL)

millimeter (mm)

minus sign

minute (min)

minute hand

mixed decimal

mixed number

mode

more than

multiple

multiplication

multiplication sentence

multiply

N

negative integer

negative number

net (in geometry)

nickel

number line

number sentence

numerator

O

obtuse angle

obtuse triangle

octagon

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 symmetry

polygon

positive integer

positive number

pound (lb)

predict

prime factorization

prime number

prism

probability

product

property of one for multiplication

protractor

pyramid

Q

quadrilateral

quart (qt)

quarter

quotient

R

radius (of a circle)

range

ratio

ray

rectangle

rectangular prism

reflection (flip)

regrouping

remainder

result

rhombus

right angle

right triangle

rotation

rounding

S

scale

scalene triangle

scientific notation

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

surface area

survey

symmetry

T

table

tally marks

tally table

tangram

temperature

tens

tenth

tessellation

thousandth

three-dimensional

ton (t)

transformation (in geometry)

translation (slide)

trapezoid

tree diagram

triangle

two-dimensional

U

unit fraction

unlike fractions

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