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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

  
   LawnGreen Box

2nd second

    
   Indigo Box   OliveDrab Box

3rd third

      
   HotPink Box   ForestGreen Box   SlateBlue Box

4th fourth

   Sienna Box   SteelBlue Box   Chartreuse Box   MediumPurple Box
        

5th fifth

          
   DarkOliveGreen Box   DarkSeaGreen Box   Aqua Box   MediumVioletRed Box   DarkGoldenrod Box

6th sixth

            
   Gold Box   RosyBrown Box   MediumSpringGreen Box   LimeGreen Box   SeaGreen Box   BurlyWood Box

7th seventh

              
   Chocolate Box   GreenYellow Box   MediumOrchid Box   CadetBlue Box   Fuchsia Box   MediumBlue Box   Lavender Box

8th eighth

                
   Magenta Box   DarkMagenta Box   Blue Box   DarkGreen Box   Cyan Box   Aquamarine Box   Coral Box   MidnightBlue Box

9th ninth

                  
   MediumAquamarine Box   SaddleBrown Box   MediumSeaGreen Box   YellowGreen Box   DodgerBlue Box   Plum Box   DarkCyan Box   DarkSlateBlue Box   BlueViolet Box

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