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What is the ordinal number of 1 to 3 1?
The ordinal number of 1-3 1 is as follows:

1, the first one.

Second.

Third.

The fourth one.

The fifth time.

The sixth time.

Seventh place.

The eighth time.

Ninth place.

10, 10th place.

1 1, eleventh.

12, 12th.

13, 13th.

14, 14th.

15, 15th.

The sixteenth session.

17, 17th.

18, 18th.

Nineteenth session.

Twenty, twenty.

2 1, 21st.

The twenty-second time.

The twenty-third session.

The 24th.

The 25th.

Twenty-sixth, twenty-sixth

The twenty-seventh

The 28th.

Twenty _ ninth.

Thirty, thirty.

3 1, 31st.

The change rule of ordinal number from 1 to 100 can be summarized as follows:

1, category I:

Such as: first (1st) first, second (2) second, third (3) third.

There are only three such ordinal numbers, which need special memory. Abbreviations in brackets are all composed of Arabic numerals followed by the last two letters of ordinal numbers.

2. the second category:?

There are fourth (4), fifth (5), sixth (6), seventh (7), eighth (8), ninth (9) and tenth (10). Eleventh (1 1th) 11th, 12th (1th) 12th, 13th (1th) 13th, 14th (1th) 14th and 5th (/)

Fifteenth, sixteenth (16) sixteenth, seventeenth (17) seventeenth, eighth (18) eighteenth, ninth (19) nineteenth, there are sixteen such ordinal numbers * *.

They all need to add the suffix -th after the corresponding cardinal words. Pay attention to the spelling of the fifth, eighth, ninth and twelfth words.