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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

  
   Aquamarine Box

2nd second

    
   SandyBrown Box   DeepSkyBlue Box

3rd third

      
   Blue Box   Brown Box   Cyan Box

4th fourth

   DodgerBlue Box   MediumSpringGreen Box   Aqua Box   LimeGreen Box
        

5th fifth

          
   Chartreuse Box   DarkMagenta Box   MediumBlue Box   CadetBlue Box   Indigo Box

6th sixth

            
   DarkGreen Box   DarkOrange Box   LawnGreen Box   Violet Box   HotPink Box   Peru Box

7th seventh

              
   Tan Box   MediumOrchid Box   SpringGreen Box   Empty Box   Navy Box   BlueViolet Box   Maroon Box

8th eighth

                
   DarkSeaGreen Box   DarkGoldenrod Box   MediumPurple Box   PowderBlue Box   Plum Box   DarkCyan Box   DarkKhaki Box   Chocolate Box

9th ninth

                  
   ForestGreen Box   DeepPink Box   RoyalBlue Box   Thistle Box   SkyBlue Box   Goldenrod Box   Lavender Box   Yellow Box   Fuchsia Box

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