# Rules for formation and use of numerals

## CARDINAL NUMERALS

A cardinal numeral is part of the sentence which represents a number. We use a cardinal number to count or to say how many of something there are.

### NUMERALS 13 – 19

We create numbers 13-19 by adding the ending -teen:

seven – seven**teen **six – sixt

**een**

### NUMERALS MULTIPLES OF TEN

Numbers that are multiples of ten are created by adding the ending -ty:

six – six**ty **seven – seven

**ty**

In a few cases, there is a slight spelling change:

four – **forty **five –

**fifty**

### SEVERAL NUMERALS

Several numerals are written completely differently:

11 – eleven 12 – twelve | 13 – thirteen 20 – twenty | 30 – thirty 100 – a hundred |

## USE OF NUMERALS IN VARIOUS SITUATIONS

### HOURS

In English, we express hours with cardinal numerals:

8:00 – eight (o’clock)

12:00 – twelve (o’clock)

11:18 – eighteen past eleven

1:58 – two (minutes) to two

### PHONE NUMBERS

Phone numbers are broken down into single numbers:

356-8971 – three five six – eight nine seven one

When two numbers are the same we use the word “double”:

466-6119 – four **double** six – six **double** one nine

In phone numbers, zero is pronounced [əu], just like the letter “o” in the alphabet:

209-5706 – two **o** nine – five seven **o** six

#### CAE, FCE, CPE

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