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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

  
   SlateBlue Box

2nd second

    
   DarkOrchid Box   MidnightBlue Box

3rd third

      
   SkyBlue Box   Khaki Box   Coral Box

4th fourth

   Violet Box   Turquoise Box   OliveDrab Box   MediumBlue Box
        

5th fifth

          
   Maroon Box   Magenta Box   Orchid Box   HotPink Box   DarkMagenta Box

6th sixth

            
   DarkOrange Box   LawnGreen Box   ForestGreen Box   MediumSeaGreen Box   Cyan Box   CadetBlue Box

7th seventh

              
   Goldenrod Box   DarkOliveGreen Box   DarkKhaki Box   Blue Box   DeepSkyBlue Box   Green Box   Gold Box

8th eighth

                
   Aqua Box   MediumPurple Box   Empty Box   MediumOrchid Box   DodgerBlue Box   Fuchsia Box   MediumSlateBlue Box   CornflowerBlue Box

9th ninth

                  
   Thistle Box   DarkGoldenrod Box   SaddleBrown Box   PowderBlue Box   DarkTurquoise Box   DarkSlateBlue Box   BlueViolet Box   Navy Box   MediumSpringGreen Box

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