All Math Vocabulary For 3Rd Grade

Front 1

Acute angle

Back 1

An angle that has a measure less than that of a right angle.

Front 2

Acute triangle

Back 2

A triangle that has three acute angles.

Front 3

Addend

Back 3

Any of the numbers that are added in addition.

Front 4

Addition

Back 4

The process of finding the total number of items when two or more groups of items are joined; the opposite operation of subtraction.

Front 5

A.M.

Back 5

The time between midnight and noon.

Front 6

Analog clock

Back 6

A tool for measuring time, in which hands move around a circle to show hours, minutes, and sometimes seconds.

Front 7

Angle

Back 7

A shape formed by two rays that share an endpoint.

Front 8

Array

Back 8

A set of objects arranged in rows and columns.

Front 9

Associative property of addition

Back 9

The property that states that you can group addends in different ways and still get the same sum.

Front 10

Associative property of multiplication

Back 10

The property that states that when the grouping of factors is changed, the product remains the same.

Front 11

Bar graph

Back 11

A graph that uses bars to show data.

Front 12

Benchmark numbers

Back 12

Numbers that are easy to work with, such as 1/2 and 1.

Front 13

Calendar

Back 13

A chart that shows the days, weeks and months of a year.

Front 14

Capacity

Back 14

The amount a container can hold.

Front 15

Cent sign

Back 15

A symbol that stands for cent or cents.

Front 16

Centimeter

Back 16

A metric unit that is used to measure length or distance.

Front 17

Century

Back 17

A measure of time on a calendar, equal to 100 years

Front 18

Change

Back 18

The money you get back for an item with coins or bills that have a value greater than the cost of the item

Front 19

Circle

Back 19

A round closed plane shape

Front 20

Closed shape

Back 20

A shape that begins and ends at the the same point.

Front 21

Combination

Back 21

A result of joining two or more things.

Front 22

Commutative property of addition

Back 22

The property that states that you can add two or more numbers in any order and get the same sum.

Front 23

Commutative property of multiplication

Back 23

The property that states that you can multiply two factors in any order and get the same product.

Front 24

Compare

Back 24

To describe whether numbers are equal to, less than, greater than each other.

Front 25

Compatible numbers

Back 25

Numbers that are easy to compute with mentally.

Front 26

Cone

Back 26

A three-dimensional, pointed shape that has a flat, round base.

Front 27

Congruent

Back 27

Shapes that have the same size and shape.

Front 28

Cube

Back 28

A three-dimensional, shape with six congruent square faces.

Front 29

Cup

Back 29

A customary unit used to measure capacity.

Front 30

Cylinder

Back 30

A three-dimensional, object that is shaped like a can.

Front 31

Data

Back 31

Information collected about people or things.

Front 32

Decade

Back 32

A measure of time, equal to 10 years.

Front 33

Decagon

Back 33

A polygon with 10 sides and 10 angles.

Front 34

Decimal point

Back 34

A symbol used to separate dollars from cents in money.

Front 35

Decimeter

Back 35

A metric unit that is used to measure length or distance; 1 decimeter = 10 centimeter.

Front 36

Denominator

Back 36

The part of a fraction below the line, which tells how many equal parts there are in the whole or in the group.

Front 37

Diagonal

Back 37

A line segment that connects two vertices of a polygon that are not next to each other.

Front 38

Difference

Back 38

The answer to a subtraction problem.

Front 39

Digital clock

Back 39

A clock that shows time to the minute, using digits.

Front 40

Digits

Back 40

The symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.

Front 41

Dime

Back 41

A coin worth 10 cents and with a value equal to that of 10 pennies; 10¢.

Front 42

Distributive property of multiplication

Back 42

The property that states that multiplying a sum by a number is the same as multiplying each addend by the number and then adding the products.

Front 43

Divide

Back 43

To separate into equal groups; the opposite operation of multiplication.

Front 44

Dividend

Back 44

The number that is to be divided in a divison problem.

Front 45

Division

Back 45

The process of sharing a number of items to find how many groups can be made or how many items will be in a group; the opposite operation of multiplication.

Front 46

Divisor

Back 46

The number that divides the dividend.

Front 47

Dollar

Back 47

Paper money worth 100 cents and equal to 100 pennies; $1.00.

Front 48

Eighths

Back 48

Shapes that have eight smaller shapes in the bigger shape and are equal.

Front 49

Elapsed time

Back 49

The time that passes from the start of an activity until the end of that activity.

Front 50

Equal Groups

Back 50

Groups that have the same number of objects.