When objects are placed in order we use ordinal numbers to address each object.
Such numbers are called ordinal numbers.
1st
first
11th
eleventh
21st
twenty-first
2nd
second
12th
twelfth
22nd
twenty-second
3rd
third
13th
thirteenth
23rd
twenty-third
4th
fourth
14th
fourteenth
24th
twenty-fourth
5th
fifth
15th
fifteenth
25th
twenty-fifth
6th
sixth
16th
sixteenth
26th
twenty-sixth
7th
seventh
17th
seventeenth
27th
twenty-seventh
8th
eighth
18th
eighteenth
28th
twenty-eighth
9th
ninth
19th
nineteenth
29th
twenty-ninth
10th
tenth
20th
twentieth
30th
thirtieth
Example:
What is the ordinal number for 15th.
This is written as Fifteenth. Answer: Fifteenth Directions: Answer the following questions. Also write at least ten examples of your own.