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.
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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