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Dividing Decimals

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					Dividing Decimals
            Section 3.5
       Dividend  Divisor  Quotient




Parts of a Division Problem
 Place decimal point for quotient
 Divide as if the numbers were whole
  numbers.
 May need to use zeros as place holders
  after the decimal point
 If the division problem doesn’t give a
  remainder of zero, you may be asked to
  round the answer to a specified place
    ◦ Divide until you have 1 digit past (to the right
      of) the decimal place you’re asked to round to.


Dividing a Decimal by a Whole
Number
   Move decimal point in divisor to the right to
    make it a whole number,
   Move decimal point in dividend the same
    number of places
    ◦ Put zeros if needed as place holders,
    ◦ You might consider rewriting the problem so it will
      look neater
   Then place decimal point for quotient directly
    above the decimal point in the dividend
   Do the division as before since you are now
    dividing a decimal by a whole number

Dividing a Decimal by a Decimal
   If you know how much was paid for a certain
    number of items – to find price per item –
    DIVIDE the total price by the number of items
   If you know the total miles traveled and the
    number of gallons of gas used on the trip – to
    find the miles per gallon – DIVIDE the total
    miles by the number of gallons.
   If you know the number of miles traveled in a
    certain number of hours – to find the miles per
    hour – DIVIDE the total miles by the number of
    hours.
   If you know several numbers and are asked for
    the average – DIVIDE the total of the numbers
    by the number of numbers


Application Notes
   If you know the number of kilometers and how
    many kilometers in 1 mile – to find the number
    of miles – DIVIDE the number of kilometers by
    the number of kilometers in 1 mile
   If you have a total price and a certain number of
    payments – to find the amount of each
    payment – DIVIDE the total price by the
    number of payments
   If you have a total of something that is being
    split/shared/divided into/by a certain number of
    people/places/etc – to find how much per/for
    1 person/place/etc – DIVIDE the total by the
    number of people/places/etc



Application Notes

				
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posted:5/7/2013
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