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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

  
   SkyBlue Box

2 two

    
   DarkGreen Box   GreenYellow Box

3 three

      
   Plum Box   ForestGreen Box   MediumTurquoise Box

4 four

   Chartreuse Box   Pink Box   Turquoise Box   DarkBlue Box
        

5 five

          
   MediumAquamarine Box   CornflowerBlue Box   MediumPurple Box   DarkGoldenrod Box   Gold Box

6 six

            
   DarkTurquoise Box   Olive Box   MediumSpringGreen Box   PowderBlue Box   Maroon Box   DarkOrange Box

7 seven

              
   CadetBlue Box   Sienna Box   Lavender Box   MediumBlue Box   DarkOliveGreen Box   RoyalBlue Box   Green Box

8 eight

                
   SandyBrown Box   Cyan Box   DeepSkyBlue Box   Thistle Box   SeaGreen Box   RosyBrown Box   DarkSlateBlue Box   LawnGreen Box

9 nine

                  
   DarkOrchid Box   MediumOrchid Box   DeepPink Box   Teal Box   SaddleBrown Box   Empty Box   Violet Box   MediumSlateBlue Box   SteelBlue Box

Single-digit numbers are called units.

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