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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

  
   MidnightBlue Box

2nd second

    
   DarkSeaGreen Box   Chartreuse Box

3rd third

      
   Aqua Box   YellowGreen Box   DarkOrchid Box

4th fourth

   MediumVioletRed Box   Violet Box   OliveDrab Box   Pink Box
        

5th fifth

          
   SeaGreen Box   BurlyWood Box   Chocolate Box   Magenta Box   SteelBlue Box

6th sixth

            
   DeepPink Box   RoyalBlue Box   RosyBrown Box   MediumTurquoise Box   Wheat Box   MediumBlue Box

7th seventh

              
   Peru Box   ForestGreen Box   Olive Box   DarkGreen Box   DarkSlateBlue Box   SandyBrown Box   Aquamarine Box

8th eighth

                
   MediumSeaGreen Box   LawnGreen Box   BlueViolet Box   Teal Box   MediumPurple Box   Thistle Box   Cyan Box   Blue Box

9th ninth

                  
   HotPink Box   Purple Box   Turquoise Box   Maroon Box   DarkTurquoise Box   Khaki Box   MediumAquamarine Box   Empty Box   Fuchsia Box

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