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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

  
   Orchid Box

2 two

    
   Tan Box   DarkCyan Box

3 three

      
   Aqua Box   DarkGreen Box   MediumPurple Box

4 four

   MediumVioletRed Box   DarkSlateBlue Box   SaddleBrown Box   GreenYellow Box
        

5 five

          
   Green Box   MediumSeaGreen Box   Chartreuse Box   SteelBlue Box   YellowGreen Box

6 six

            
   Teal Box   DarkKhaki Box   Wheat Box   Peru Box   Goldenrod Box   Brown Box

7 seven

              
   MediumBlue Box   MediumAquamarine Box   Coral Box   ForestGreen Box   BurlyWood Box   Olive Box   OliveDrab Box

8 eight

                
   SandyBrown Box   SpringGreen Box   Thistle Box   MediumSlateBlue Box   SlateBlue Box   Fuchsia Box   DarkViolet Box   Chocolate Box

9 nine

                  
   LawnGreen Box   Khaki Box   Pink Box   Lavender Box   DodgerBlue Box   Plum Box   DeepSkyBlue Box   MediumTurquoise Box   DarkSeaGreen Box

Single-digit numbers are called units.

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