Download Expressing Numbers and Operations in English

E xpressing N um bers and
Operations in E nglish
1. Numbers
1
2
3
4
5
6
7
8
9
10
one
two
three
four
five
six
seven
eight
nine
ten
11
12
13
14
15
16
17
18
19
20
Cardinal numbers from 1 through 1 000 000
eleven
21 twenty-one
31
twelve
22 twenty-two
40
thirteen
23 twenty-three
50
fourteen
24 twenty-four
60
fifteen
25 twenty-five
70
sixteen
26 twenty-six
80
seventeen
27 twenty-seven
90
eighteen
28 twenty-eight
100
nineteen
29 twenty-nine
1 000
twenty
30 thirty
1 000 000
thirty-one
forty
fifty
sixty
seventy
eighty
ninety
one hundred
one thousand
one million
Examples:
305
three hundred and five
754
1 507
seven hundred and fifty-four
one thousand, five hundred and seven
2 328
1 800
two thousand, three hundred and twenty-eight
one thousand, eight hundred or eighteen hundred
1 436 209
one million, four hundred thirty-six thousand, two hundred and nine
2 700 400
two million, seven hundred thousand, four hundred
(NOTE: The British use and before the last two figures, but the Americans usually leave the and
out).
The number 0:
Nought (UK English)
Zero (US English)
Oh (like the letter O): used when reading out numbers figure by figure (e.g. telephone numbers,
credit card numbers, etc).
1
E xpressing N um bers and O perations - 3 o E SO
2
Decimal numbers:
In English we use a full stop (.) instead of a comma (,) to separate the main part of a number from
the decimal part:
0.1
nought point one (UK) or
0.75
1.263
nought point seven five (UK)
one point two six three
zero point one (US)
or
zero point seven five (US)
You can use a comma (,) in large numbers to separate the hundreds, thousands, and millions. For
example, 5,074 means five thousand and seventy four. In UK English, spaces are sometimes used
instead of commas (5 074).
Place value:
In our decimal number system, the value of each digit depends on its place in the number. Each
place is 10 times the value of the next place to its right.
Millions
Hundred Thousands
Ten Thousands
Thousands
Hundreds
Tens
Units
Tenths
Hundredths
Thousandths
Ten Thousandths
1 000 000
100 000
10 000
1 000
100
10
1
0.1
0.01
0.001
0.0001
Ordinal numbers:
1st
2nd
3rd
4th
5th
6th
7th
8th
9th
10th
first
second
third
fourth
fifth
sixth
seventh
eighth
ninth
tenth
11th
12th
13th
14th
15th
16th
17th
18th
19th
20th
Ordinal numbers from 1 through 1 000 000
eleventh
21st twenty-first
31st
twelfth
22nd twenty-second
40th
thirteenth
23rd twenty-third
50th
fourteenth
24th twenty-fourth
60th
fifteenth
25th twenty-fifth
70th
sixteenth
26th twenty-sixth
80th
seventeenth
27th twenty-seventh
90th
eighteenth
28th twenty-eighth
100th
nineteenth
29th twenty-ninth
1 000th
twentieth
30th thirtieth
1 000 000th
D pto. M atemáticas. IES Jovellanos. 2011
thirty-first
fortieth
fiftieth
sixtieth
seventieth
eightieth
ninetieth
one hundredth
one thousandth
one millionth
E xpressing N um bers and O perations - 3 o E SO
3
2. Operations
Operation symbols
+
plus
−
× or ·
minus
times
/ or :
divided by
=
6
=
equals or is equal to
is not equal to
<
>
is less than
is greater than
≤
≥
is less than or equal to
is greater than or equal to
Addition (to add):
2+3 =5
Two plus three equals five
The answer is called the sum or total.
Subtraction (to subtract):
7−3 =4
Seven minus three equals four
The answer is called the difference.
Multiplication (to multiply):
5 · 3 = 15
Five times three equals fifteen or Five multiplied by three. . .
The answer is called the product.
Division (to divide):
8:2=4
9
2
1
4
Eight divided by two equals four
9:
2:
4:
1:
dividend
divisor
quotient
remainder
✁✃✁✃✁✃✁✃✁✃✁✃✁✃
D pto. M atemáticas. IES Jovellanos. 2011