Numbers
 

We count by 10s like this:

10, 20, 30, 40, 50, 60, 70, 80, 90, 100.

 

  1 group of ten  = 10
  2 groups of ten = 20
  3 groups of ten = 30
  4 groups of ten = 40
  5 groups of ten = 50
  6 groups of ten = 60
  7 groups of ten = 70
  8 groups of ten = 80
  9 groups of ten = 90
10 groups of ten = 100

 

The chart below shows groups of tens.

                                      
                   
                   
                   
                   
                   
                   
                   
                   
                   
10 20 30 40 50 60 70 80 90 100

 

Fill in the boxes below.

10, 11, , 13, 14, 15

21, 22, 23, 24, , 26, 27, , 29

36, 37, 38, 39, , 41, 42, , 44, 45

42, 43, , 45, 46, 47, , 49

55, 56, 57, , , 60

63, 64, , 66, , 68, 69,

77, , 79, , 81,

85, 86, , , 89

93, 94, 95, , 97, 98, , 100

10, , , , , , 70, ,

 

How many groups of ten are shown below?

 
 
 
 
 
 
 
 
 
 

ten.

 

     
   
   
   
   
   
   
   
   
   

tens.

 

                     
           
           
           
           
           
           
           
           
           

tens.

 
 

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