Online Self-Tests(A13)

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  1-2. Find the answer to the equation.

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  (1 point)

  
  

  1	+	(	2	+	1	)	=
  3			6		6

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  3-4. Find the answer to the equation.

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  (1 point each)

  
  

  2	–	(	1	+	1	)	=
  3			6		6

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  5-6. Find the answer to the equation.

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  (1 point each)

  
  

  1	+	(	3	–	1	)	=
  3			6		6

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  7. Find the unknown value that makes the equation true.

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  (1 point)

  	+	3	=	7
  3		6		6

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  8. Find the unknown value that makes the equation true.

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  (1 point)

  1	+		=	2
  6		6		3

• 
  

  9-10. Find the answer to the equation.

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  (1 point each)

  
  

  2	+	1	=
  6		3