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Whole Numbers and Ordinal Numbers: Introduction

In the unit Whole Numbers and Cardinal Numbers, we learned about numbers - whole numbers - from zero to one million: what these numbers are and how to write them. We learned that we write a whole number that tells us how many of something that we have, the number is called a cardinal number.

In this unit Whole Numbers and Ordinal Numbers, we learn how to write numbers when they are used to describe an order, such as rank or position. An example is to say that something is third from the right. Numbers when written that describe an order are called ordinal numbers.

Whole Numbers and Ordinal Numbers: 0 to 9

0th zeroth

As we saw in the unit Whole Numbers and Cardinal Numbers, zero is nothing.

1st first

  
   YellowGreen Box

2nd second

    
   PowderBlue Box   CornflowerBlue Box

3rd third

      
   DodgerBlue Box   Indigo Box   Magenta Box

4th fourth

   Sienna Box   Blue Box   Brown Box   MediumVioletRed Box
        

5th fifth

          
   HotPink Box   SkyBlue Box   BurlyWood Box   MediumSlateBlue Box   Green Box

6th sixth

            
   OliveDrab Box   MidnightBlue Box   DarkTurquoise Box   MediumTurquoise Box   Pink Box   Khaki Box

7th seventh

              
   Maroon Box   Wheat Box   BlueViolet Box   Orchid Box   MediumBlue Box   Navy Box   DarkViolet Box

8th eighth

                
   DeepSkyBlue Box   Lavender Box   Chartreuse Box   MediumPurple Box   Aquamarine Box   Gold Box   Thistle Box   SaddleBrown Box

9th ninth

                  
   CadetBlue Box   Plum Box   Yellow Box   Turquoise Box   Teal Box   RosyBrown Box   SlateBlue Box   DarkOrange Box   LawnGreen Box

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