Ordinal numbers





Ordinal numbers is a word used to describe the numerical position of objects. For example, if some students participated in a running race we can order them as, ' first, second, third, and so on'. First denotes the child who completed the race first. Second marks the child who came second and so on.

Form:

Spelling of ordinal-number:

We have to just add 'th 'to the cardinal numbers.

Example:

  • Six → Sixth
  • Eleven → Eleventh
  • Seven → Seventh
  • Thirteen → Thirteenth
  • Sixteen → Sixteenth

Exceptions:

  • One → first
  • two → second
  • three → third
  • five → fifth
  • eight → eighth
  • nine → ninth
  • twelve → twelfth


While writing compound cardinal number in the form, only the last figure is written as an ordinal.

  • 21st → twenty-first
  • 375th &rarr: three hundred and seventy-fifth
  • 1112th→ one thousand, one hundred and twelfth

1st
First 11th
Eleventh
2nd
Second 12th
Twelfth
3rd
Third 13th
Thirteenth
4th
Fourth 14th
Fourteenth
5th
Fifth 15th
Fifteenth
6th
Sixth 16th
Sixteenth
7th
Seventh 17th
Seventeenth
8th
Eighth 18th
Eighteenth
9th
Ninth 19th
Nineteenth
10th
Tenth 20th
Twentieth

Titles:

While writing the names for Kings and Queens ordinal-numbers are written in Roman numbers. While saying (in spoken English)the definite article should be said before the ordinal-numbers.

  • Charles II → Charles the Second
  • .
  • Edward IV → Edward the Fourth
  • .


    Ordinal numbers
    Practical examples of using this topic

    (i) My friend is waiting in 6th floor for me.

    (ii) In this shopping mall you can find flower shop in the 1st floor




    Number line

    Ordinal Numbers

    Cardinal Nominal Numbers

    Properties Of Numbers

    Quote on Mathematics

    “Mathematics, without this we can do nothing in our life. Each and everything around us is math.

    Math is not only solving problems and finding solutions and it is also doing many things in our day to day life. They are:

    It subtracts sadness and adds happiness in our life.

    It divides sorrow and multiplies forgiveness and love.

    Some people would not be able accept that the subject Math is easy to understand. That is because; they are unable to realize how the life is complicated. The problems in the subject Math are easier to solve than the problems in our real life. When we people are able to solve all the problems in the complicated life, why can we not solve the simple math problems?

    Many people think that the subject math is always complicated and it exists to make things from simple to complicate. But the real existence of the subject math is to make things from complicate to simple.”






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