Saturday, September 25, 2010

Decimals in money 2

 In this lesson we're going to some more further work in decimals in money.
In most of the exam, like school certificate or major exams, there are 4 operation all the time and the 4 operation decimal is one of them. So what I would like to talk about is not a simple question, a short answer questions.

  1. Our first example is "Poppy went to the store and bought toothpaste for $5.32, liquid soap for $3.48, hair shampoo for $4 and razor for 97 cents. How much change will Poppy get from $30?

  We add all of the stuffs that Poppy bought and we subtract from the $30.
$5.32 + $3.48 + $4 + $0.97 = $13.77.
$30 - $13.77 = $16.23.

  Therefore the answer is $16.23.

  2. If a kilo of beef costs $9.57, ho much would 5 kilograms cost?
                                        
       $9.57                                 This question's structure is finding the quantity, so is multiplication.
     x       5                                 after the calculation is finished, you need to put the decimal point
                                                 2 figures to the right.
     $47.85 


  3.  A reward money of $ 6325.90 has to be shared equally between 5 people.
     How much does each person receive?

           1265.18
      5   6325.90                                  Shared equally means divide $6325.90 by 5.
           60
             32                                      
             30
               25
               25
                   9
                   5
                   40

  Therefore the answer is $1265.18.

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