Reading Figures in English
|
Figure
|
Ways
of expressing
|
|
605
651
4,651
20,000 m
200,000 m
   
.1
0.1
0.2
0.01
|
six hundred and five
six hundred and
fifty-one
four thousand, six hundred and fifty-one
twenty thousand
meters
two hundred thousand
meters
one and a quarter
one and a half
one and two-thirds
one and three quarters
point one
zero point one
naught point two
(GB), zero (or “O”) point two
O point O one, zero
point zero one
|
Ordinal Number |
Ways of expressing |
|
1st
2nd
3rd
5th
20th
30th |
First
Second
Third
Fifth
Twentieth
Thirtieth
|
|
|
Figure |
Ways of expressing |
Fraction |
½
1/3 2/3
¼ 2/4
1/5 2/5
1/6 2/6
|
a half
a third two thirds
a quarter two quarters
a fifth two fifths
a sixth two sixths
|
Decimal |
0.25
0.20
0.10
|
Point two five
Point two zero
Point one zero
|
Percentages |
50 %
70 %
|
Fifty percent
Seventy percent
|
Proportions |
3/5
2/10
|
Three in five of …..
Two in ten of ….
|
Ratio |
2:1
19:1
|
Two to one
Nineteen to one
|
Examples:
- Mother rabbit delivered 10 baby rabits last night, only four in ten (4/10) were alive.
- In the ratio of approximately 3: 1 (three to one) between birth and mortality rates, family planning should be encouraged.
- 3/5 (…………) of the forest in Kalimantan has gone.
- 2/5 (…………) of the world population live poor condition.
What do these symbols mean in English?
- equivalent to º
- not equal to ¹
- approximately equal to »
- tend to ®
- less than <
- greater than >
- much less than <<
- much greater than >>
- less than or equals to £
- greater than or equal to ³
- proportional to µ
- infinity ¥
- plus or minus ±
- therefore \
- per ¤
Reading Greek letters and the alphabet
Letter Phonetic Transcription Pron.
a ei (d)ay
b bi be(e)
c si sea
d di
e I h(e)
h eitò
i ai I
t ti tea
x eks ex
b bi:ta
g
d ‘delta
m mju: mew
n nju: new
p pai pie
t qi:t
f fai fie
k
x sai
y psai
w
Reading Mathematical Symbols
Symbol Pronunciation
A + B A
plus B
A – B A
minus B
A X B A
times B, A multiplied by B
A
over B, A upon B (GB)
one
over square root two pi
x-1 x
to the minus one
x2 x
square
x3 x
cubed
xn x
to the n
e
to the minus x squared over two
cn c
sub n
no n
zero, n naught (GB)
aij a
sub i and j
a’ a
prime
a” a
double prime
a
bar
a* a
star
a+ a
dagger
h
bar
x
dot
absolute
value a, modulus a
norm
x
rot
= Ñ x curl
A
= Ñ x curl
A
[A,B] = AB – BA commutator
of A and B
0 < t < x zero
less than t, less than x
a2 ³ 1 a
squared greater or equal one
¥ infinity
sigma
from n equals zero to infinity
DG delta
G,
Laplacian G
n! n
factorial, factorial n
dy
by dt
d
two y by dt squared
partial
y by by partial t
Fn
x tends to zero as n tends to infinity
n ® ¥
Integral
from minus infinity to plus infinity
integral
from zero to infinity of jay n
contour
integral over C of f
double
integral over D
double
integral over å
a Î A a
belongs to A
A É B A
contains B
A Í B A
is a subset of B, A is contained in B
( ) bracket
[ ] square
bracket
Rx R
subscript x
Examples
1. 
f equals 1 over 2p (pai) square root of capital LC
f equals 1 over 2p (pai) square root of capital LC
2. E = dT4 capital E equals delta capital T to
3. a (7 – b) = x a times open bracket 7 minus b close bracket equals x
4. 
twelve plus open bracket a
minus b close bracket all over 7b
twelve plus open bracket a
minus b close bracket all over 7b
equals b
5. 
a minus b in bracket
times a plus b in bracket equals y
a minus b in bracket
times a plus b in bracket equals y
Read out these expressions
1. 
6. 
11. 
16. 
6. 11. 16.
2. 
7. 
12. 
17.
7. 12. 17.
3. 
8. 
13. 
18. 
8. 13. 18.
4. 
9. 
14. 
19. 
9. 14. 19.
5. 
10. 
15. 
10. 15.
20. 
21. 
21.
How are these values and
equations spokens?
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