Online Self-Tests(S20)

• 
  

  1-2. Solve the equation.

  ---

  (1 point each)

  
  

  1	–	1	=
  		6

• 
  

  3-4. Solve the equation.

  ---

  (1 point each)

  
  

  2	–	2	=	1
  		6

• 
  

  5-6. Solve the equation.

  ---

  (1 point each)

  
  

  3	–	3	=	2
  		6

• 
  

  7-8. Find the value of x.

  ---

  (1 point each)

  
  

  4	–	4	=	3
  		6

• 
  

  9-10. Solve the equation.

  ---

  (1 point each)

  
  

  1	–	3	=
  		4

• 
  

  11-12. Find the unknown values.

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  (1 point each)

  
  

  2	–	3	=	1
  		4