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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

  
   Teal Box

2nd second

    
   Wheat Box   DeepPink Box

3rd third

      
   Plum Box   Coral Box   MediumTurquoise Box

4th fourth

   SandyBrown Box   DarkOrchid Box   DarkKhaki Box   SaddleBrown Box
        

5th fifth

          
   Tan Box   Blue Box   MediumBlue Box   MediumSpringGreen Box   DarkOrange Box

6th sixth

            
   Indigo Box   Brown Box   DodgerBlue Box   Sienna Box   Violet Box   Green Box

7th seventh

              
   DarkGreen Box   SpringGreen Box   YellowGreen Box   HotPink Box   Orchid Box   Aquamarine Box   DarkOliveGreen Box

8th eighth

                
   MediumOrchid Box   Navy Box   Peru Box   Khaki Box   MediumSeaGreen Box   Pink Box   Thistle Box   DarkViolet Box

9th ninth

                  
   BlueViolet Box   Magenta Box   MediumVioletRed Box   OliveDrab Box   RoyalBlue Box   CornflowerBlue Box   DarkGoldenrod Box   MediumPurple Box   MediumSlateBlue Box

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