Math Words

MathWordWall

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[ Operations | Place Value & Number Sense | Geometry ]

Operations
Word
Definition
Example
multiplication Finds the total number of objects based on the number of objects in each group times the number of groups
3×5 = 15
division Splits numbers into groups; the inverse operation of multiplication
15÷3 = 5
factor Numbers that make up another number when multiplied together
Factors of 15:
1, 3, 5, 15

decompose Breaking a number into smaller parts
234 = 200+30+4
234 = 2
×3×3×13
product The answer in a multiplication problem
3×5 = 15
array A geometric picture of a multiplication problem
Array
dimensions The measurement of the sides of a plane figure, also the factors of a multiplication problem
3 cm × 5 cm rectangle
unmarked array
An array that does not have the area marked off in square units
unmarked array
combination
Two factors which pair together to form a specific product
3, 5 [3×5=15]
1, 15 [1
×15=15]
multiple The product of a specific number times any other number(s)
Multiples of 2:
2, 4, 6, 8, 10...
even numbers
Numbers which are multiples of two
2, 4, 6, ...8...100...1,000...
odd numbers
Numbers which are not multiples of two
1, 3, 5...101...
prime numbers
Numbers which have only one and itself as factors
1, 2, 3, 5, 7, 11...
composite numbers
Numbers which are made up by more than one combination of factors
4, 8, 16, 44
square number
The product of a number multiplied by itself, also written as 22
22=2×2=4
32=3
×3=9
prime factorization
The process of finding all of the prime numbers which are factors of a number
Prime factors for 100:
1, 2, 5
representation
A way of showing a mathematical relationship or concept
3 groups of 5:
3
×5
group representation
distributive property
Multiplication can distribute across addition which allows us to break up multiplication problems into smaller parts
3×15=3×(10+5)=(3×10)+(3×5)=30+15=45

p=(2
×l)+(2×w)=2×(l+w)
associative property
Addition: Addends (the parts of an addition problem) may be added together in any order
Multiplication: Factors may be multiplied together in any order
3+(5+10)=(3+5)+10
2
×(3×5)=(2×3)+5
<, less than
The number, variable, or operation shown to the left of the symbol is smaller than the one shown to the right
3<5
>, greater than
The number, variable, or operation shown to the left of the symbol is larger than the one shown to the right
9>7
≤, less than or equal to
The number, variable, or operation shown to the left of the symbol is smaller than or is equal to the one to the right
3≤4
2+2≤4
≥, greater than or equal to
The number, variable, or operation shown to the left of the symbol is larger than or is equal to the one to the right
4≥3
2
×2≥4
=, equal
The numbers, variables, or operations shown on either side of the symbol are equal to each other
3=3
2+3=5
≠, not equal
The numbers, variables, or operations shown on either side of the symbol are not equal to each other
3≠5
2+3≠6
ascending Ordered from smallest to largest
2, 5, 7, 9, 11
descending Ordered from largest to smallest 11, 9, 7, 5, 2
dividend The number being split into groups
15÷3=5
divisor The number of groups into which the dividend is being split or the size of the groups into which the dividend is being split
15÷3=5
quotient The answer to a division problem
15÷3=5
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Number Sense & Place Value
standard form
The normal way we write numbers
952,345
written form
The words we use to write numbers
Nine hundred fifty-two thousand, three hundred forty-five
expanded notation
Writing out numbers based on their place value
900,000 + 50,000 + 2,000 +300 + 40 +5
hundred thousands place
The position in which a number is equal to itself times 100,000
952,345
ten thousands place
The position in which a number is equal to itself times 10,000
952,345
thousands place
The position in which a number is equal to itself times 1,000
952,345
hundreds place
The position in which a number is equal to itself times 100
952,345
tens place
The position in which a number is equal to itself times 10
952,345
ones place
The position in which a number is valued as itself
952,345
million One thousand thousands
1,000,000
billion One thousand millions
1,000,000,000
trillion One thousand billions
1,000,000,000,000
fraction A group or object divided into smaller portions (or parts)
Fraction
numerator The number on the top of the fraction, represents the number of parts of a whole that we have (or are shaded in)
Numerator
denominator The number on the bottom of the fraction, represents the number of parts into which the whole is split
Denominator example
decimal A fraction represented as a number based on tenths, hundredths, thousandths...
.5 = one half
.25 = one quarter
.1 = one tenth
percent A portion (fraction) out of one hundred
100% = whole
50% = one half
equivalent Fractions, decimals, percents, or numbers which are equal to each other
Equivalent fractions
tenths
The position in which a number is equal to the fraction of itself over ten
.1 = 1 tenth
hundredths The position in which a number is equal to the fraction of itself over one hundred
.01 = 1 hundredth
thousandths The position in which a number is equal to the fraction of itself over one thousand
.001 = 1 thousandth
ten thousandths
The position in which a number is equal to the fraction of itself over ten thousand
.0001 = 1 ten thousandth
number line
A representation of numbers on a line in order from smallest to largest (or largest to smallest).
<---1--2--3--4--->
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2D Geometry/Plane Figures
angle The space between two intersecting lines or line segments
Angle
vertex (vertices)
The point where two lines or line segments intersect
Vertex Example
right angle
An angle that measures 90°
Right Angle example
acute angle
An angle that measures less than 90°
Acute Angle
obtuse angle
An angle that measures more than 90°
Obtuse Angle Example
straight angle
An angle that measures 180°
Straight Line example
triangle A 2D plane polygon with three sides and three angles
Triangles
right triangle
A triangle with a 90° angle at one of its vertices
Right Triangle
obtuse triangle
A triangle with an obtuse angle at one of its vertices
Obtuse Triangle
acute triangle
A triangle with all acute angles
Acute Triangle
equilateral triangle
A triangle with all equal sides and angles
Equilateral Triangle
isosceles triangle A triangle with two equal sides and one different side
Isosceles Triangle
scalene triangle
A triangle with no equal sides
Scalene Triangle
quadrilateral A polygon with four sides
Quadrilaterals
parallel Two lines which never intersect
Parallel Lines
trapezoid A quadrilateral with only one set of parallel sides
Trapezoid
parallelogram A quadrilateral with two sets of parallel sides
Parallelograms
rectangle A parallelogram with all equal angles
Rectangle
rhombus A parallelogram with all equal sides
RhombusRhombus
square A rectangle with all equal sides and a rhombus with all equal angles
Square
regular polygon
A polygon with all equal sides and all equal angles
Regular Polygon examples
irregular polygon
A polygon which does not have all equal sides and all equal angles
Irregular Polygons
pentagon A regular polygon with five sides
Pentagon
hexagon A regular polygon with six sides
Hexagon
heptagon A regular polygon with seven sides
Heptagon
octagon A regular polygon with eight sides
Octagon
decagon A regular polygon with ten sides
Decagon
supplementary angle
Two angles which measure 180° when their angle measures are added together
Supplementary Angle
complementary angle
Two angles which measure 90° forming a right angle when their measures are added together
Complementary Angle
adjacent angle
Angles which are side by side and share a vertex
Adjacent Angles
internal angle
The angle inside a single polygon"s sides
Internal Angle
external angle
The supplementary angle to the internal angle
External Angle
dimensions
The measures of the sides
Dimensions
perimeter The measure around the outside of a polygon
p=2×(l+w) / Perimeter = 2 × (length + width)
Perimeter
area The measure of the inside of a polygon
a=l×w (area= length × width)
Area
perpendicular Intersecting lines which form 90° internal angles
Perpendicular
line
Extends infinitely in both directions
Line
line segment
A portion of a line between points
Line Segment
ray A line segment which begins at a point and extends infinitely in one direction
Ray
line symmetry
A shape shows line symmetry when it can be bisected by a line and both sides are identical
Line Symmetry
rotational symmetry
A shape shows rotational symmetry when it can be rotated and be identical to the original shape at some angle other than 0° or 360°.
Rotational Symmetry
diagonal A line segment with end points at vertices in the side of a 2D polygon
Diagonals