# Math Derby Vocabulary Third Grade

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1.
the measure of how much a container can hold – CAPACITY
2.
numbers that are multiplied in a multiplication problem – FACTORS
3.
a number that is written using both a whole number and a fraction –
MIXED NUMBER
4.
a polygon with three sides and three angles – TRIANGLE
5.
a number that cannot be evenly divided by 2 and ends in 1, 3, 5, 7, or 9 –
ODD NUMBER
6.
a solid figure in the shape of a ball – SPHERE
7.
the distance around a closed plane figure or region – PERIMETER
8.
a number that can be evenly divided by 2 and ends in 0, 2, 4, 6, or 8 –
EVEN
9.
the number written above the line in a fraction – NUMERATOR
10.
a line that divides a figure into 2 halves that match exactly – LINE OF
SYMMETRY
11.
the result of multiplying numbers – PRODUCT
12.
the number of square units needed to cover a region – AREA
13.
figures that have the same size and the same shape – CONGRUENT
FIGURES
14.
an angle that forms a square corner – RIGHT ANGLE
15.
a name given to time between 12 noon and midnight – P.M.
16.
a quadrilateral with four right angles; the opposite sides are the same
length – RECTANGLE
17.
the answer when subtracting two numbers – DIFFERENCE
18.
two numbers used to name a point on a coordinate grid – ORDERED
PAIR
Birmingham City Schools
Revised January 2005
1
19.
the number written below the line in a fraction; it tells the number of parts
in all – DENOMINATOR
20.
the amount left over after dividing - REMAINDER
21.
a solid figure with six faces that are congruent squares – CUBE
22.
a number from 0 to 1 that indicates the chance of something happening –
PROBABILITY
23.
a customary unit of length equal to 12 inches – FOOT
24.
a customary unit of weight equal to 16 ounces – POUND
25.
a name given to time between midnight and noon – A.M.
26.
a straight path that goes indefinitely in opposite directions – LINE
27.
an operation that gives the total number when you put together equal
groups - MULTIPLICATION
28.
a customary unit of length equal to three feet or 36 inches - YARD
29.
a rectangular arrangement of objects in rows and columns – ARRAY
30.
lines that never intersect – PARALLEL LINES
31.
two lines that intersect to form right angles – PERPENDICULAR LINES
32.
a polygon with four sides - QUADRILATERAL
33.
information gathered by observing, counting, or measuring – DATA
34.
a dot used to separate dollars from cents and ones from tenths in a
number – DECIMAL POINT
35.
a part of a line that has two end points – LINE SEGMENT
36.
a part of a line that has one end point and continues endlessly in one
direction – RAY
37.
in the base-10 numeration system, one of the symbols 0, 1, 2, 3, 4, 5, 6, 7,
8, and 9 which can be used to write any number – DIGIT
Birmingham City Schools
Revised January 2005
2
38.
a collection of related addition and subtraction, or multiplication and
division facts, made from the same numbers - FACT FAMILY
39.
an exact position often marked by a dot - POINT
40.
a chart on which data is recorded – TALLY CHART
41.
the difference between the greatest and least numbers in a set of data –
RANGE
42.
a closed plane figure formed by three or more line segments that meet
only at their endpoints – POLYGON
43.
a display of data along a number line – LINE PLOT
44.
one out of ten equal parts of a whole – TENTHS
45.
a number in the form of a/b that names part of an object or collection of
objects, compares two quantities, or represents division – FRACTION
46.
to give an approximate number or answer – ESTIMATE
47.
a property of addition and multiplication that says that changing the order
of the elements being added or multiplied will not change the sum or
product – COMMUTATIVE PROPERTY
48.
in the metric system, a unit of capacity used to measure liquid. It is equal
to 1,000 milliliters – LITER
49.
a metric unit of length equals to 100 centimeters – METER
50.
a 6-sided polygon – HEXAGON
Birmingham City Schools
Revised January 2005
3