### Home > MC2 > Chapter 10 > Lesson 10.1.2 > Problem 10-21

10-21.

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?