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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

  
   Sienna Box

2nd second

    
   SteelBlue Box   CadetBlue Box

3rd third

      
   CornflowerBlue Box   ForestGreen Box   DarkGreen Box

4th fourth

   PowderBlue Box   MediumSpringGreen Box   DarkMagenta Box   RoyalBlue Box
        

5th fifth

          
   MediumPurple Box   Chocolate Box   DeepSkyBlue Box   DodgerBlue Box   Aquamarine Box

6th sixth

            
   LawnGreen Box   MidnightBlue Box   SeaGreen Box   BlueViolet Box   Olive Box   Peru Box

7th seventh

              
   DarkCyan Box   LimeGreen Box   Brown Box   Gold Box   SandyBrown Box   Fuchsia Box   SaddleBrown Box

8th eighth

                
   Violet Box   YellowGreen Box   Cyan Box   DarkOrchid Box   BurlyWood Box   DarkGoldenrod Box   OliveDrab Box   Chartreuse Box

9th ninth

                  
   Orchid Box   RosyBrown Box   MediumTurquoise Box   Maroon Box   Aqua Box   HotPink Box   Lavender Box   MediumOrchid Box   MediumSlateBlue Box

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