Online Self-Tests(F21)

• 
  

  1-2. Find the missing values.

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  (1 point each)

  
  

  5	–	4	=
  6		6

• 
  

  3-4. Find the missing values.

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  (1 point each)

  
  

  7	–	1	=
  9		9

• 
  

  5-6. Find the missing values.

  ---

  (1 point each)

  
  

  2	–	1	=
  4		4

• 
  

  7-8. Find the missing values.

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  (1 point each)

  
  

  	–	1	=	1
  		10		10

• 
  

  9-10. Find the missing values.

  ---

  (1 point each)

  
  

  6	–		=	4
  8				8

• 
  

  11-12. Find the missing values.

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  (1 point each)

  
  

  8	–	7	=
  7		7