CPM Homework Help : CC1MN Problem 1-20

The value of a decimal becomes clearer when the place value is spoken or written as the number it names. For example, $0.1$ makes more sense if it is read as “one tenth” rather than “zero point one.”

Write the following numbers in words so that the place value can be identified.
$0.4$
$1.3$
$0.56$
$2.008$

Help (a):
Make sure to pay attention to the last digit place of the decimal value. Use the chart below for guidance.
- $1000\text{’s}$
  $100\text{’s}$
  $10\text{’s}$
  $1\text{’s}$
  $.1\text{’s}$
  $.01\text{’s}$
  $.001\text{’s}$
  $.0001\text{’s}$
  $1$
  $2$
  $7$
  $.$
  $5$
  $3$
  $6$
  $9$

$1000\text{’s}$	$100\text{’s}$	$10\text{’s}$	$1\text{’s}$		$.1\text{’s}$	$.01\text{’s}$	$.001\text{’s}$	$.0001\text{’s}$
	$1$	$2$	$7$	$.$	$5$	$3$	$6$	$9$

Step 1 (a):
Look to see if there is a number to the left of the decimal; if so write it out. If there is no number to the left of the decimal, skip to step $3$ .
Step 2 (a):
Include 'and' for the decimal point if there is a number to the left of the decimal.
Step 3 (a):
Write out the number to the right of the decimal up to the last digit. Write the place value of the last digit.

Example (a):

$0.64 = \text{sixty-four hundredths}$

With these steps, try writing each number in words.

Now reverse your thinking. Write the decimals that go with the following words.
thirty-five hundredths
three and two tenths
six hundredths

Hint 1 (b):
Refer to part (a) for help with decimal places.
Hint 2 (b):
Consider the significance of the place value identified by the last word.

Answer (b):

$\text{thirty-fivehundredths}=0.35$