1-0: 1 one two three four five six seven eight nine 10?

11-20:111112121313141415151616/kloc

2 1-30:2 1 21 22 23 24 25 26 27 28 29 30 30?

Ordinal number and abbreviation:

1- 10: No.65438 +0 first 1 second second third fourth fourth fifth sixth seventh eighth ninth 10 tenth 10?

1 1-20: No.65438 +065438+0 No.65438 +02 No.65438 +03 No.65438 +03 No.65438+H No.65438 +05 No.55438+ 16 16th 16 17 17th 17 18 19 9th 65438.

2 1-30: No.265438 +0 No.21 2 1 No.22 No.22 No.22 No.22 No.23 No.23 No.24 No.24 No.25 No.26. H 26th 27th 27th 27th 28th 28th 29th 29th 30th 30th 30th 30th.

：

Numerals in English can be divided into two categories: cardinal numbers and ordinal numbers.

Primitive words are numbers that describe the number of things. Ordinal numbers refers to the numeral indicating order, which means "which number" in Chinese. In addition, ordinal numbers are also used to describe the date of birth, for example, May-first (5 May 1).

Sometimes ordinal numbers can be expressed by abbreviations. The main abbreviations are as follows:

First → 1st, second → second, third → third, fourth → fourth, twentieth → twentieth, twenty-third → twenty-third.

Where 1st, No.2 and No.3 are special forms, others are basically Arabic numerals followed by th.

Memory formula:

The basic order changes regularly, and -th is added at the end of the word.

One, two, three, special attention, suffix letters t, d, d.

Eight to t, nine to e, ve for f, ty for y, and e before th.

If you encounter dozens, use the base first and then use the order.