Online Self-Tests(S19)

• 
  

  1-2. Solve the equation.

  ---

  (1 point each)

  
  

  1	–	1	=
  		5

• 
  

  3-4. Solve the equation.

  ---

  (1 point each)

  
  

  1	–	1	=
  		6

• 
  

  5-6. Solve the equation.

  ---

  (1 point each)

  
  

  1	–	1	=
  		7

• 
  

  7-8. Find the value of x.

  ---

  (1 point each)

  
  

  1	–	1	=
  		8

• 
  

  9-10. Solve the equation.

  ---

  (1 point each)

  
  

  1	–	1	=
  		9

• 
  

  11-12. Find the unknown values.

  ---

  (1 point each)

  
  

  1	–	1	=
  		10