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Whole Numbers and Cardinal Numbers: Introduction

In this unit Whole Numbers and Cardinal Numbers, we will look at numbers - whole numbers - from zero to one million: what these numbers are and how to write them.

When we write - in English or another language - a whole number that tells us how many of something that we have, the number is called a cardinal number. For example, 0 is a whole number and the word zero is a cardinal number.

Whole Numbers and Cardinal Numbers: 0 to 9

0 Zero

Zero is nothing. Other words for zero include nil, naught, and nought. There are also many slang words for zero - too many to list here.

1 one

  
   Violet Box

2 two

    
   Green Box   GreenYellow Box

3 three

      
   DarkOliveGreen Box   DarkBlue Box   SandyBrown Box

4 four

   MidnightBlue Box   MediumVioletRed Box   Pink Box   DarkTurquoise Box
        

5 five

          
   Teal Box   Chartreuse Box   Orchid Box   Navy Box   SteelBlue Box

6 six

            
   Purple Box   Lavender Box   Aqua Box   MediumOrchid Box   Maroon Box   OliveDrab Box

7 seven

              
   Indigo Box   Fuchsia Box   SkyBlue Box   CornflowerBlue Box   Gold Box   MediumTurquoise Box   DarkSlateBlue Box

8 eight

                
   LawnGreen Box   Peru Box   CadetBlue Box   Brown Box   Magenta Box   DarkOrange Box   SaddleBrown Box   DarkMagenta Box

9 nine

                  
   RoyalBlue Box   DarkGoldenrod Box   PowderBlue Box   SpringGreen Box   YellowGreen Box   RosyBrown Box   DeepSkyBlue Box   LimeGreen Box   Empty Box

Single-digit numbers are called units.

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