Download Third Grade Vocabulary from KCCT

Third Grade Math Vocabulary from KCCT
Addend: a number to be added
Addition: an operation on two or more numbers that gives a sum
Angle: formed when two rays or line segments share an endpoint
Bar Graph: bars of different heights
Bills: a rectangular shaped paper used as a form of money; United States bills come in
notes equal to 1 dollar, 5 dollars, 10 dollars, 20 dollars, 50 dollars, and 100 dollars
Centimeter: metric unit of measurement; 2.54 cm equal an inch
Charts: information represented in the form of graphs or tables
Circle: a figure in which all the points are the same distance from the center
Circle Graph: shows how portions of a set of data compare with the whole set
Clock: a tool used to measure time
Coins: a metal in the shape of a disc used as a form of money; United States coins equal
1 cent, 5 cents, 10 cents, 25 cents, half dollar and 1 dollar
Cone: a figure that has one face that is a circle
Cube: a figure with 6 faces, all the same size
Decimal Point: a period separating the ones from the tenths in a decimal
Denominator: represents the bottom number of a fraction and tells the total number of
equal parts that represent the whole
Difference: the answer in subtraction
Digits: the symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9
Edge: formed at the line segment where two faces meet
Estimate: a guess that is close to the real or exact answer
Even Numbers: are divisible by 2 and always end with a digit of 0, 2, and 4. 6, or 8
Expanded form: a number that is written as the sum of the products of each digit and its
place value
Face: the flat surface on a solid figure
Factors: numbers that are multiplied to give a product
Foot: a unit of length equal to 12 inches
Fraction: name of a part of a whole or group
Frequency Table: table using numbers to record data
Function: a rule that you apply to an input value to produce an output value
Graph: a way to show and compare numerical information
Hexagon: a figure that has 6 sides and 6 angles
Hour hand: on a clock the shorter hand, which represents the hour of a day
Inch: a unit of length that is 1/12 of a foot
Length: the measurement of a distance between two points
Like fractions: fractions with the same denominator
Line: straight and continues in both directions and does not end
Line plot: a graph using marks (such as X) above a number on a number line to
represent each piece of data
Line segment: straight and is part of a line that has two endpoints
Line symmetry: a line that evenly divides a figure making both sides match
Mile: unit of length equal to 5,280 feet or 1,760 yards
Minute hand: on a clock, the longer hand that represents the minutes of a day
Multiplication: an operation on two or more numbers to find a total; a shortcut for
repeated addition
Number Sentence: to form the number sentence you need to choose the correct
operation (addition, subtraction, multiplication, or division) and a comparing symbol (=,
<, >,)
Numerator: represents the top number of a fraction and tells the number of equal parts
out of the denominator
Octagon: a figure that has 8 sides and 8 equal angles
Odd numbers: numbers that are NOT divisible by 2; numbers that end with a digit of 1,
3, 5, 7, or 9
Ounce: units of measure for weight; usually used for smaller objects
Patterns: groups of objects arranged in a predictable way
Pentagon: a polygon with five sides
Pictograph: graphs that use pictures to show numerical data; the key of the pictograph
tells what one picture represents
Place value: value of each number by the location of the digit
Place value chart: chart that shows the value of each digit in a number
Point: an exact location or position
Polygon: a closed figure with straight sides
Pound: unites of measure used to find out how much something weighs
Product: the answer in a multiplication problem
Pyramid: the figure that has one base and faces that are all triangles; the base can be a
square or another shape
Ray: a straight part of a line that has one endpoint; the ray starts at the endpoint and
continues in one direction without ending
Rectangle: a figure with 4 sides and 4 square angles, with the opposite sides being equal
Rhombus: a figure with 4 equal sides
Right angle: an angle with measures of 90 degrees
Rounding: replacing a number with another number to express the nearest ten, hundred
or so on of the original number
Side: the line segment that forms a polygon
Sphere: a round-shaped figure that has no faces or straight lines, such as a smooth ball
Square: a figure that has 4 equal sides and 4 square angles
Standard form: a number that is written in numeral form
Survey: to gather a sample of data from a small group that can be representative of a
whole
Tables: information arranged in rows and columns
Tally marks: one way to organize data; each tally mark represents one time that value
appears in the data
Trapezoid: a figure with 4 sides that has only one pair of parallel sides
Two-dimensional figure: a figure that has only length and width
Three-dimensional figure: a figure that has length, width, and height. Also known as a
solid figure
Triangle: a figure with 3 sides and 3 angles
Venn diagrams: circular regions used to show relationships between sets of data
Vertex: the location point where three or more edges meet
Vertices: plural of vertex
Weight: a measurement that tells how heavy something is
Whole numbers: the set of numbers including zero
Word form: numbers written using words
Yard: a unit of length equal to 3 feet