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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

  
   DarkBlue Box

2nd second

    
   OliveDrab Box   CornflowerBlue Box

3rd third

      
   Khaki Box   Aquamarine Box   Tan Box

4th fourth

   YellowGreen Box   BlueViolet Box   Empty Box   Indigo Box
        

5th fifth

          
   DarkKhaki Box   MediumVioletRed Box   Coral Box   Chocolate Box   CadetBlue Box

6th sixth

            
   RosyBrown Box   GreenYellow Box   MediumSpringGreen Box   DarkGoldenrod Box   SlateBlue Box   DarkOrange Box

7th seventh

              
   PowderBlue Box   MediumAquamarine Box   DeepPink Box   SpringGreen Box   Chartreuse Box   Navy Box   DarkSeaGreen Box

8th eighth

                
   MediumSlateBlue Box   Pink Box   DarkOrchid Box   Thistle Box   SaddleBrown Box   LawnGreen Box   DarkViolet Box   RoyalBlue Box

9th ninth

                  
   Green Box   DarkSlateBlue Box   MidnightBlue Box   DodgerBlue Box   Orchid Box   DarkMagenta Box   DarkCyan Box   Aqua Box   SteelBlue Box

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