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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

  
   Goldenrod Box

2nd second

    
   Violet Box   MediumPurple Box

3rd third

      
   MediumSpringGreen Box   DeepSkyBlue Box   SpringGreen Box

4th fourth

   LawnGreen Box   Wheat Box   Magenta Box   Brown Box
        

5th fifth

          
   HotPink Box   Khaki Box   SaddleBrown Box   Lavender Box   DeepPink Box

6th sixth

            
   Cyan Box   DarkOrchid Box   DarkOrange Box   Sienna Box   BlueViolet Box   DarkKhaki Box

7th seventh

              
   Empty Box   SeaGreen Box   MediumSlateBlue Box   Tan Box   DarkViolet Box   DarkCyan Box   Purple Box

8th eighth

                
   MediumVioletRed Box   YellowGreen Box   SandyBrown Box   MidnightBlue Box   Chartreuse Box   Gold Box   Pink Box   Peru Box

9th ninth

                  
   Green Box   MediumBlue Box   Navy Box   DarkGoldenrod Box   Plum Box   SkyBlue Box   Yellow Box   LimeGreen Box   ForestGreen Box

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