A number is a word (such as ‘five’) or
symbol (such as ‘3’) that represents an amount of quantity. We use numbers for
counting or calculating.
 Even numbers (= 2, 4, 6, 8, etc.)
 Odd numbers (= 1, 3, 5, 7, etc.)
Whole number
a number (such as 0, 1, 5, 8) without
fractions or decimals
Round number
a number that often ends in 0 or 5
Cardinal numbers
Numbers (such as 1, 2, 3) that indicate
quantity are called cardinal numbers.
 I have five books.
0 zero, nought

30
thirty

1 one

40
forty

2 two

50
fifty

3 three

60
sixty

4 four

70
seventy

5 five

80
eighty

6 six

90
ninety

7 seven

100
one hundred

8 eight

101
one hundred and one

9 nine

500
five hundred

10 ten

1000
a/one thousand

11 eleven

1001
a/one thousand and one

12 twelve

1,500
a/one thousand five hundred

13 thirteen

100,000
a/one hundred thousand

14 fourteen

1,000,000
a/one million

15 fifteen


16 sixteen


17 seventeen


18 eighteen


19 nineteen


20 twenty


21 twentyone


22 twentytwo


23 twentythree

Ordinal numbers
Numbers (such as first, second, third) that
are used to put things in an order are called ordinal numbers.
 This is the fiftysixth floor.
1st first

60th
sixtieth

2nd second

61st
sixtyfirst

3rd third

62nd
sixtysecond

4th fourth

63rd
sixtythird

5th fifth

100th
hundredth

6th sixth

1000th
thousandth

Nominal numbers
Numbers (such as zip code or a player on a
team) used in labeling or identifying something are called nominal numbers.
The
number 0
0 is called zero (British English also
nouht). The letter o means zero in years, telephone numbers, room numbers, bus numbers
and times. (My number is five o double six =My number is 5066). Nil means the
number 0 as the score in games (The score was three nil=The score was 30.).
Fraction
A division of a whole number is called
fraction.
1/2 a half

4/16 four
sixteenths

1/3 a/one
third

6/32 six
thirtyseconds

1/4 a/one
quarter

1^{1}/2
one and a half

3/4 three
quarters

2^{2}/3
two and two thirds

1/5 a fifth

Decimal fraction
Decimal fraction or decimal is fraction
that is written with a point (.). We say all the digits after a decimal point
separately. Money is said like normal numbers.
0.5
point five

0.35 point
three five

0.05 point
zero five

0.529 point
five two nine

2.5 two
point five

$26.95
twentysix ninetyfive

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