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Home > CC1 > Chapter 4 > Lesson 4.1.1 > Problem 4-11


Rewrite each decimal as a fraction or fraction as a decimal.  

  • Notice the place value of the decimal point.

    What can you divide by to get ?

    When you divide any number by etc., the decimal point moves to the left according to the number of zeros in the divisor.

  • Use the same method as in part (a).

  • Notice that 1.21 has a decimal point two decimal places to the left. Two decimal places refers to the hundredths place.

  • You can conclude from parts (a) and (c) that dividing by a number consisting of multiple zeros moves the decimal left a number of times equal to the amount of zeros.

  • Notice that the number has two zeros.

  • How many zeros does the denominator have? How many times and in which direction should the decimal point move?