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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

  
   Wheat Box

2nd second

    
   Tan Box   MediumSlateBlue Box

3rd third

      
   GreenYellow Box   MediumAquamarine Box   Cyan Box

4th fourth

   Thistle Box   DarkSlateBlue Box   SandyBrown Box   MediumBlue Box
        

5th fifth

          
   DarkGreen Box   Coral Box   SkyBlue Box   DeepSkyBlue Box   SpringGreen Box

6th sixth

            
   Gold Box   Orchid Box   Violet Box   Purple Box   DarkOliveGreen Box   Goldenrod Box

7th seventh

              
   MediumOrchid Box   Empty Box   DarkViolet Box   PowderBlue Box   LawnGreen Box   Green Box   Khaki Box

8th eighth

                
   DarkBlue Box   MidnightBlue Box   Teal Box   BlueViolet Box   RosyBrown Box   Maroon Box   MediumPurple Box   Chocolate Box

9th ninth

                  
   Sienna Box   MediumVioletRed Box   SteelBlue Box   Yellow Box   RoyalBlue Box   Aqua Box   SaddleBrown Box   DarkMagenta Box   Peru Box

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