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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

  
   MediumOrchid Box

2 two

    
   Khaki Box   MediumPurple Box

3 three

      
   Indigo Box   SteelBlue Box   PowderBlue Box

4 four

   Thistle Box   SeaGreen Box   Turquoise Box   DarkOliveGreen Box
        

5 five

          
   Aqua Box   MediumBlue Box   MediumSlateBlue Box   Blue Box   Empty Box

6 six

            
   DarkGreen Box   Lavender Box   Violet Box   Coral Box   Plum Box   SlateBlue Box

7 seven

              
   Navy Box   SkyBlue Box   DarkOrchid Box   Gold Box   Maroon Box   DeepSkyBlue Box   Green Box

8 eight

                
   DarkSlateBlue Box   DarkKhaki Box   Tan Box   Olive Box   SpringGreen Box   DarkOrange Box   SaddleBrown Box   Peru Box

9 nine

                  
   ForestGreen Box   CornflowerBlue Box   MediumTurquoise Box   DarkCyan Box   BlueViolet Box   CadetBlue Box   MidnightBlue Box   Pink Box   Teal Box

Single-digit numbers are called units.

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