Math Vocabulary Words with Examples and Pictures
Straight line– Draw a
straight line across the top of the page.
Perpendicular– The two lines of bones are set
perpendicular to one another.
Curve– He drew a line on the paper in a smooth
curve.
Arc– The rainbow described an
arc in the sky.
Circle– Draw a
circle six centimetres in diameter.
Radius– We are measuring the
radius of the circle.
Diameter– The
diameter measures twice the radius.
Section– The architect drew the house in
section.
Square– First of all, draw a
square.
Rectangle– He drew a
rectangle on the blackboard.
Diagonal– The
diagonal line forms the jabot effect.
Right triangle– A
right triangle has a right angle.
Oval– Our table is
oval in shape.
Center– A diameter passes through the
center of a circle.
Whole– Two halves make a
whole.
A half (1/2)– He kept
a half of the cake for himself.
A quarter (1/4)– It’s about a page and
a quarter.
Cube– How many faces does a
cube have?
Cylinder– This is a
cylinder.
Pyramid– He drew a
pyramid.
Cone– Fold the paper to make the shape of a
cone.
Parallel lines– There are three
parallel lines.
Math Symbols with Images and Examples
Addition
– Read as:
Plus/
Add
– Example: “
Three plus three equals six.” (3 + 3 = 6)
Subtraction
– Read as:
Minus
– Example: “
Three minus one equals two.” (3 – 1 = 2)
Multiplication
– Read as:
Times/
Multiplied by
– Example:
“Four multiplied by five is twenty.” (4 x 5 = 20)
Division
– Read as:
Divided by
– Example:
“Nine divided by three is three.” (9 : 3 = 3)
Plus-minus
– Read as:
Plus or minus
– Example:
“Three plus or minus two equals five or one.” (3 ± 2 = 5 or 1)
Strict inequality
– Read as:
Is greater than
– Example:
“Three is greater than two.” (3 > 2)
– Read as:
Is less than
– Example: “Two is less than three.” (2 < 3)
Equality
– Read as:
Is equal to
– Example:
“Four is equal to three plus one.” (4 = 3 + 1)
Inequation
– Read as:
Is not equal to
– Example:
“Four is not equal to three.” (4 ≠ 3)
Tilde
– Read as:
Is similar to
Congruence
– Read as:
Is congruent to
Infinity
– Read as:
Infinity
Inequality
– Read as:
Is greater than or equals
– Example:
“a is greater than or equal to b.” (a ≥ b)
– Read as:
Is less than or equals
– Example:
“a is less than or equal to b.” (a
≤ b)
Material equivalence
– Read as:
Is equivalent to
Material implication
– Read as:
Implies
Theta
– Read as:
Theta
Empty set
– Read as:
Empty set
Triangle or delta
– Read as:
Triangle/
Delta
For all
– Read as:
For all
Pi constant
– Read as:
Pi
Integral
– Read as:
Integral
Intersection
– Read as:
Intersection of two sets
Union
– Read as:
Union of two sets
Factorial
– Read as:
Factorial
Therefore
– Read as:
Therefore
Square root
– Read as:
Square root of
Perpendicular
– Read as:
Is perpendicular to
Exists
– Read as:
Exists
Percent
– Read as:
Percent
Line
– Read as:
Line AB
Line segment
– Read as:
Segment AB
Ray
– Read as:
Ray AB
Right angle
– Read as:
Right angle
Angle
– Read as:
Angle
Summation
– Read as:
Sum of/
Sigma
Braces (grouping)
– Read as:
Braces
Brackets
– Read as:
Brackets
Parentheses (grouping)
– Read as:
Parentheses
Line Names with Examples and Pictures
Straight – Draw a
straight line across the top of the page.
Diagonal – They fly in long
diagonal lines or large V-shapes.
Vertical – The
vertical line makes an angle with the horizontal line.
Parallel lines – There are three
parallel lines.
Curved – Architecturally speaking, a
curved line can support much more weight than a straight line.
Horizontal – The teacher drew a long,
horizontal line across the blackboard.
Dotted – Cut along the
dotted line.
Wavy – She drew a
wavy line under the word.
Zigzag – It is a
zigzag line.
Counting Numbers 1-100
0
– Read as: Zero
1
– Read as: One
2
– Read as: Two
3
– Read as: Three
4
– Read as: Four
5
– Read as: Five
6
– Read as: Six
7
– Read as: Seven
8
– Read as: Eight
9
– Read as: Nine
10
– Read as: Ten
11
– Read as: Eleven
12
– Read as: Twelve
13
– Read as: Thirteen
14
– Read as: Fourteen
15
– Read as: Fifteen
16
– Read as: Sixteen
17
– Read as: Seventeen
18
– Read as: Eighteen
19
– Read as: Nineteen
20
– Read as: Twenty
21
– Read as: Twenty-one
22
– Read as: Twenty-two
23
– Read as: Twenty-three
24
– Read as: Twenty-four
25
– Read as: Twenty-five
26
– Read as: Twenty-six
27
– Read as: Twenty-seven
28
– Read as: Twenty-eight
29
– Read as: Twenty-nine
30
– Read as: Thirty
31
– Read as: Thirty-one
32
– Read as: Thirty-two
33
– Read as: Thirty-three
34
– Read as: Thirty-four
35
– Read as: Thirty-five
36
– Read as: Thirty-six
37
– Read as: Thirty-seven
38
– Read as: Thirty-eight
39
– Read as: Thirty-nine
40
– Read as: Forty
41
– Read as: Forty-one
42
– Read as: Forty-two
43
– Read as: Forty-three
44
– Read as: Forty-four
45
– Read as: Forty-five
46
– Read as: Forty-six
47
– Read as: Forty-seven
48
– Read as: Forty-eight
49
– Read as: Forty-nine
50
– Read as: Fifty
51
– Read as: Fifty-one
52
– Read as: Fifty-two
53
– Read as: Fifty-three
54
– Read as: Fifty-four
55
– Read as: Fifty-five
56
– Read as: Fifty-six
57
– Read as: Fifty-seven
58
– Read as: Fifty-eight
59
– Read as: Fifty-nine
60
– Read as: Sixty
61
– Read as: Sixty-one
62
– Read as: Sixty-two
63
– Read as: Sixty-three
64
– Read as: Sixty-four
65
– Read as: Sixty-five
66
– Read as: Sixty-six
67
– Read as: Sixty-seven
68
– Read as: Sixty-eight
69
– Read as: Sixty-nine
70
– Read as: Seventy
71
– Read as: Seventy-one
72
– Read as: Seventy-two
73
– Read as: Seventy-three
74
– Read as: Seventy-four
75
– Read as: Seventy-five
76
– Read as: Seventy-six
77
– Read as: Seventy-seven
78
– Read as: Seventy-eight
79
– Read as: Seventy-nine
80
– Read as: Eighty
81
– Read as: Eighty-one
82
– Read as: Eighty-two
83
– Read as: Eighty-three
84
– Read as: Eighty-four
85
– Read as: Eighty-five
86
– Read as: Eighty-six
87
– Read as: Eighty-seven
88
– Read as: Eighty-eight
89
– Read as: Eighty-nine
90
– Read as: Ninety
91
– Read as: Ninety-one
92
– Read as: Ninety-two
93
– Read as: Ninety-three
94
– Read as: Ninety-four
95
– Read as: Ninety-five
96
– Read as: Ninety-six
97
– Read as: Ninety-seven
98
– Read as: Ninety-eight
99
– Read as: Ninety-nine
100
– Read as: One hundred
Counting Big Numbers
101
– Read as: One hundred and one
200
– Read as: Two hundred
300
– Read as: Three hundred
400
– Read as: Four hundred
500
– Read as: Five hundred
600
– Read as: Six hundred
700
– Read as: Seven hundred
800
– Read as: Eight hundred
900
– Read as: Nine hundred
1.000
– Read as: One thousand
10.000
– Read as: Ten thousand
100.000
– Read as: One hundred thousand
1.000.000
– Read as: One million
10.000.000
– Read as: Ten million
189.325.476
– Read as: One hundred and eighty-nine million, three hundred and twenty-five thousand, four hundred seventy-six
How to Write Numbers in Words
32%
– Read as:
Thirty two percent
10m x 3m
– Read as:
Ten metres by three metres
8.3
– Read as:
Eight point three
$2.66
– Read as:
Two dollars, sixty-six cents
32
– Read as:
Three squared
23
– Read as:
Two cubed
24
– Read as:
Two to the power of four
½
– Read as:
A half / One half
¾
– Read as:
Three quarters
⅔
– Read as:
Two thirds
1½
– Read as:
One and a half
1975
– Read as:
Nineteen seventy-five
2001
– Read as:
Two thousand and one
263-3847
– Read as:
Two-six-three, three-eight-four-seven
1,325,476
– Read as:
One million, three hundred and twenty-five thousand, four hundred seventy-six
26⁰C
– Read as:
Twenty six degrees
21st
– Read as:
Twenty-first
92nd
– Read as:
Ninety-second
53rd
– Read as:
Fifty-third
67th
– Read as:
Sixty-seventh
