Online Self-Tests(A19)

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  1-2. Find the answer to the equation.

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  (1 point)

  
  

  4	+	(	1	+	1	)	=
  8			8		4

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  3-4. Find the answer to the equation.

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  (1 point each)

  
  

  4	–	(	1	+	1	)	=
  8			4		8

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  5-6. Find the answer to the equation.

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  (1 point each)

  
  

  4	+	(	1	–	1	)	=
  8			4		8

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

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  (1 point)

  	+	2	=	6
  2		8		8

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

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  (1 point)

  1	+		=	3
  4		2		4

• 
  

  9-10. Find the answer to the equation.

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  (1 point each)

  
  

  1	+	2	=
  2		5