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3rd Grade Math Vocabulary
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Gravity
3rd grade Math Vocabulary
Key Concepts:
Terms in this set (69)
add
To combine, put together two or more quantities.
addend
Any number being added.
area
The measure, in square units, of the inside of a plane figure.
array
An arrangement of objects in equal rows.
attribute
A characteristic of an object, such as color, shape, size, etc.
bar graph
A graph that uses the height or length of rectangles to compare data.
standard form (numeral form)
A common way of writing a number using digits.
The value of a numeral depends on where it appears in the number.
also known as
standard form
centimeter
A metric unit of length equal to 0.01 of a meter.
100 cm = 1 m
Commutative Property of Multiplication
Changing the order of the factors does not change the product.
compare
To decide if one number is greater than, less than, or equal to another number. Look for the DIFFERENCES.
congruent
Having exactly the same size and shape.
customary measurement system
A system of measurement used in the U.S. The system includes
units for measuring length, capacity, and weight.
decompose (expanded form)
To separate into components or basic elements.
denominator
The quantity below the line in a fraction. It tells how many equal parts are in the whole.
difference
The amount that remains after one quantity is subtracted from another.
digit
Any of the symbols
0, 1, 2, 3, 4, 5, 6, 7, 8, or 9.
divide
To separate into equal groups and find the number in each group or the number of groups.
equal groups
Groups that contain the same number of objects. TO DIVIDE: separate items into equal groups. TO MULTIPLY: combine or add all objects together
equal parts
Parts of an object or group that have been divided equally into pieces.
estimate
To find a number close to an exact amount; an estimate tells about how much or about how many.
expanded form
A way to write numbers that shows the place value of each digit.
fact family (multiply & divide)
A group of related facts that use the same numbers.
Also called related facts.
factor
The whole numbers that are multiplied to get a product.
foot
A customary unit of length.
1 foot = 12 inches.
fourths
The parts you get when you divide something into 4 equal parts.
fraction
A way to describe a part of a whole or a part of a group by using equal parts.
half hour
A unit of time equal to 30 minutes.
halves
The parts you get when you divide something into 2 equal parts.
hexagon
A polygon with six sides.
inch
A customary unit of length.
12 inches = 1 foot.
interval
The distance between two points.
key
A part of a map, graph, or chart that explains what the symbols mean.
length
How long something is. The distance from one point to another.
Length is measured in units such as inches, feet, centimeters, etc.
meter
A standard unit of length in the metric system.
metric system
A system of measurement based on tens. The basic unit of capacity is the liter. The basic unit of length is the meter. The basic unit of mass is the gram.
multiple
A product of a given whole number and any other whole number.
multiply
The operation of repeated addition of the same number.
numerator
The number written above the line in a fraction. It tells how many equal parts are described in the fraction.
parallelogram
A quadrilateral with two pairs of parallel and congruent sides.
pentagon
A polygon that has five sides.
perimeter
The distance around a figure.
pictograph
A graph that uses pictures or symbols to represent data.
place value
The value a digit has because of its place in a number.
polygon
A two-dimensional figure.
product
The answer to a multiplication problem.
quadrilateral
A four sided polygon.
quarter hour
A unit of time worth 15 minutes.
quotient
The answer to a division problem.
regroup
To rearrange the formation of a group.
Fact Family (addition & subtraction)
Related facts using the same 3 numbers in four different number sentences
repeated addition
Adding equal groups of objects to find the total amount of objects. Another way to MULTIPLY: 4 three times is 12
repeated subtraction
Subtracting equal groups to find the total amount of groups. another way to Divide 12 divided into four groups is 3
rhombus
A quadrilateral with all four sides equal in length.
round a whole number
To find the nearest ten, hundred, thousand, (and so on).
square unit
A unit, such as square centimeter or square inch, used to measure area.
standard form
The common or usual way of writing a number using digits.
Also called
base-ten numeral form
.
subtract
An operation that gives the difference between two numbers.
Subtraction can be used to compare two numbers, or to find out how much is left after some is taken away.
sum
The answer to an addition problem.
tally table
A table that uses tally marks to record data.
tens
Sets of ten ones.
Examples: 10, 20, 30, 40, 50, 60, 70, 80, or 90
thirds
The parts you get when you divide something into 3 equal parts.
trapezoid
A quadrilateral with one pair of parallel sides and one pair of sides that are not parallel.
two-dimensional
Having length and width. Having area, but not volume.
Also called a
plane figure
.
vertex (plural - vertices)
A point at which two or more sides of a geometric figure meet.
whole
All of an object, a group of objects, shape, or quantity.
whole numbers
Whole numbers are zero and the counting numbers 1, 2, 3, 4, 5, 6, and so on.
If a number has a negative sign, a decimal point, or a part that's a fraction, it is not a whole number.
width
One dimension of a 2-dimensional or 3-dimensional figure.
word form
A way of using words to write a number.
Also called
number names
.
yard
A customary unit of length.
1 yard = 3 feet
or 36 inches
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