Online Self-Tests(A20)

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  1. 76 birds are sitting in a tree. If 51 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)

  
  

  2.1

  –

  =

  1.9

  
  
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  3. An airplane has 323 seats. If there are 2 airplanes of the same model, how many people can be seated?

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  (1 point)

  
  

  Answer:

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  4. Determine which side of the equation is greater.

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  (>, <, or =)

  
  

  6	–	2		4
  8		8		8

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

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  (1 point)

  
  

  –

  (2

  ×

  3)

  =

  7

  +

  5

  
  
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  6. If x – 3 = 9 and y = 14, find the value of y – x.

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  (1 point)

  
  

  Answer:

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