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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

  
   GreenYellow Box

2nd second

    
   Yellow Box   DarkOliveGreen Box

3rd third

      
   SlateBlue Box   Cyan Box   MediumSpringGreen Box

4th fourth

   SaddleBrown Box   RoyalBlue Box   BlueViolet Box   CadetBlue Box
        

5th fifth

          
   LimeGreen Box   Fuchsia Box   Pink Box   Violet Box   Sienna Box

6th sixth

            
   BurlyWood Box   YellowGreen Box   Olive Box   Magenta Box   DarkTurquoise Box   SpringGreen Box

7th seventh

              
   MediumSlateBlue Box   DarkGreen Box   Gold Box   DarkSlateBlue Box   Tan Box   HotPink Box   Chocolate Box

8th eighth

                
   Thistle Box   MidnightBlue Box   Teal Box   DarkMagenta Box   MediumTurquoise Box   Orchid Box   DarkGoldenrod Box   Lavender Box

9th ninth

                  
   MediumVioletRed Box   DarkKhaki Box   Plum Box   DarkOrange Box   DodgerBlue Box   DarkViolet Box   PowderBlue Box   Coral Box   LawnGreen Box

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