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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

  
   SkyBlue Box

2nd second

    
   Blue Box   Green Box

3rd third

      
   Teal Box   MediumVioletRed Box   DodgerBlue Box

4th fourth

   MediumAquamarine Box   Violet Box   DarkGreen Box   LawnGreen Box
        

5th fifth

          
   Aqua Box   DarkMagenta Box   Empty Box   Maroon Box   Chartreuse Box

6th sixth

            
   Pink Box   RosyBrown Box   DarkGoldenrod Box   DeepSkyBlue Box   Navy Box   Wheat Box

7th seventh

              
   Peru Box   Brown Box   CadetBlue Box   ForestGreen Box   Orchid Box   Turquoise Box   Khaki Box

8th eighth

                
   Sienna Box   MediumBlue Box   MediumSlateBlue Box   MediumOrchid Box   Yellow Box   SeaGreen Box   SaddleBrown Box   SpringGreen Box

9th ninth

                  
   LimeGreen Box   DarkSlateBlue Box   SlateBlue Box   Gold Box   DarkCyan Box   MediumTurquoise Box   BlueViolet Box   HotPink Box   DarkViolet Box

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