Online Self-Tests(S1)

• 
  

  1-2. Find the answer to the equation.

  ---

  (1 point each)

  
  

  1	–	1	=
  2		4

• 
  

  3-4. Find the answer to the equation.

  ---

  (1 point each)

  
  

  1	–	1	=
  2		8

• 
  

  5-6. Find the answer to the equation.

  ---

  (1 point each)

  
  

  1	–	3	=
  2		8

• 
  

  7-8. Find the unknown values that makes the equation true.

  ---

  (1 point each)

  	–	1	=	1
  4		2

• 
  

  9-10. Find the unknown values that makes the equation true.

  ---

  (1 point each)

  1	–		=	1
  4		8

• 
  

  11-12. Find the answer to the equation.

  ---

  (1 point each)

  
  

  2	–	2	=
  4		8