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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

  
   SandyBrown Box

2nd second

    
   DarkSlateBlue Box   CornflowerBlue Box

3rd third

      
   MediumSeaGreen Box   Teal Box   Tan Box

4th fourth

   RosyBrown Box   LimeGreen Box   RoyalBlue Box   DarkKhaki Box
        

5th fifth

          
   Peru Box   HotPink Box   MediumTurquoise Box   Navy Box   DarkCyan Box

6th sixth

            
   Turquoise Box   Coral Box   Magenta Box   MediumBlue Box   Thistle Box   Wheat Box

7th seventh

              
   LawnGreen Box   CadetBlue Box   Lavender Box   SkyBlue Box   Chocolate Box   Khaki Box   SlateBlue Box

8th eighth

                
   MediumVioletRed Box   DarkGreen Box   Plum Box   Indigo Box   MediumOrchid Box   Goldenrod Box   Empty Box   Cyan Box

9th ninth

                  
   MidnightBlue Box   SpringGreen Box   DarkBlue Box   Brown Box   DarkViolet Box   ForestGreen Box   Gold Box   DodgerBlue Box   Aqua Box

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