练习册

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    19．计算 【查看更多】

     

    题目列表(包括答案和解析)

    计算题
    1. What percentage of area is shaded?

    Answer: _                                                          .
    2. If a group of 6 people have an average age of 21,  and each person is half the age of the next person,
        what are the ages of the 6 people?
    Answer: _                                                           .

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    计算题
    1.
    Answer:                                                                                
    2. Bill is eighteen years old, and his age is three times that of Mary.  
    When Billis twice as old as Mary, how old is he then?
    Answer:                                                                        

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    计算题。
    1. Kate has a quzuler more books than Peter and Peter has a third more books than Jill.
    Altogether they have 120. How many books does each person have?
    Answer: __________________________________________________________
    2. What weight must be placed at "?" to balance the Scale?

    Answer:____________________________________________________________

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    计算题
      
    Solve the puzzle to find out how many ping-pong balls are flying about here. The top ball is your answer.   Answer: ____                                                                

    2. What is twice a half of five and a half?    
    A. Ten and a half.              
    B. Five and a half.    
    C. Ten.                      
    D. Two and a half.    
    Answer: _____                                                                

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    计算题.
    1.At 12 noon my watch was correct. However, it then started to lose 18 minutes per hour.
    Four hours ago it stopped completely and is now showing the time as 15:30.
    What is the correct time now?
    Answer: _____________________________________________________________
    2.
    What value of weight should be placed on the scales to balance?
    Answer: _____________________________________________________________

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