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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

  
   Turquoise Box

2 two

    
   Teal Box   MidnightBlue Box

3 three

      
   MediumVioletRed Box   MediumSlateBlue Box   Pink Box

4 four

   Brown Box   Goldenrod Box   RosyBrown Box   DarkGoldenrod Box
        

5 five

          
   DarkKhaki Box   ForestGreen Box   DarkViolet Box   DarkOliveGreen Box   MediumAquamarine Box

6 six

            
   SeaGreen Box   Magenta Box   MediumPurple Box   Indigo Box   CadetBlue Box   BurlyWood Box

7 seven

              
   MediumOrchid Box   Gold Box   DodgerBlue Box   GreenYellow Box   DeepSkyBlue Box   DarkBlue Box   Lavender Box

8 eight

                
   Tan Box   DarkMagenta Box   PowderBlue Box   MediumSpringGreen Box   DeepPink Box   Olive Box   Violet Box   DarkTurquoise Box

9 nine

                  
   YellowGreen Box   RoyalBlue Box   Plum Box   Fuchsia Box   MediumTurquoise Box   Thistle Box   DarkSeaGreen Box   SteelBlue Box   DarkSlateBlue Box

Single-digit numbers are called units.

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