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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

  
   Pink Box

2 two

    
   DarkKhaki Box   PowderBlue Box

3 three

      
   DeepPink Box   MediumTurquoise Box   LawnGreen Box

4 four

   DeepSkyBlue Box   ForestGreen Box   DarkBlue Box   Wheat Box
        

5 five

          
   Aqua Box   DarkGreen Box   Teal Box   Sienna Box   MediumSlateBlue Box

6 six

            
   OliveDrab Box   RoyalBlue Box   Chocolate Box   HotPink Box   Magenta Box   Cyan Box

7 seven

              
   MediumVioletRed Box   Gold Box   Turquoise Box   SaddleBrown Box   DodgerBlue Box   MediumSeaGreen Box   LimeGreen Box

8 eight

                
   DarkMagenta Box   MediumBlue Box   DarkSeaGreen Box   MidnightBlue Box   Green Box   MediumOrchid Box   CadetBlue Box   SpringGreen Box

9 nine

                  
   Empty Box   Thistle Box   Brown Box   SandyBrown Box   Navy Box   DarkOrchid Box   BlueViolet Box   DarkOliveGreen Box   SlateBlue Box

Single-digit numbers are called units.

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