Online Self-Tests(B40)

• 
  

  1. 27 birds are sitting in a tree. If 9 birds fly away, how many birds are left in the tree?

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  (1 point)

  
  

  Answer:

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• 
  

  2. Determine the unknown decimal.

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  (1 point)

  
  

  1.1

  –

  =

  0.7

  
  
• 
  

  3. An airplane has 286 seats. If there are 2 airplanes of the same model, how many people can be seated in total?

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  (1 point)

  
  

  Answer:

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  4. Determine the unknown value that makes the equation true.

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  (1 point)

  
  

  ×

  5

  =

  160

  
  
• 
  

  5. Determine the unknown value that makes the equation true.

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  (1 point)

  
  

  –

  (9

  ×

  5)

  =

  10

  +

  6

  
  
• 
  

  6. Determine the unknown value that makes the equation true.

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  (1 point)

  
  

  ÷

  9

  =

  5