A

add

addend

addition

addition sentence

after

array

B

balance

bar graph

before

between

C

calendar

circle

closed figure

cone

congruent figures

corner

count back

count on

cube (in geometry)

cup (c)

cylinder

D

difference

dime

dollar

double

double minus one

double plus one

E

equal

equal groups

equal parts

estimate

even number

F

face

fact family

fewer

flip

fraction

G

greater than (>)

H

half-dollar

half-hour

hour

hour hand

hundred

I

inside

L

less than (<)

line

line symmetry

M

minus sign

minute hand

more than

multiplication sentence

multiply

N

nickel

number sentence

O

odd number

on

ones

open figure

outside

P

pattern

penny

perimeter

pictogram

pint (pt)

plus sign

pyramid

Q

quart (qt)

quarter

R

rectangle

rectangular prism

S

side

skip count

slide

sphere

square (in geometry)

subtract

subtraction sentence

sum

symmetry

T

table

tally marks

temperature

tens

triangle

W

week

Z

zero

zero property of addition