Writing a Decimal Number Given its Name: Advanced

Introduction

A decimal number has a whole number part and a decimal part separated by decimal point. For example: 56.09821

It can also be a number having only decimal part. For example: 0.00345

We write a decimal point for the word 'and' in the number name.
We write a whole number for the number name before the word 'and'. This is the whole number part of the decimal number.
We write a whole number for the number name after the word 'and'. This is the decimal part of the decimal number.
We see to it that the last digit has the place value given by the decimal unit like 'tenths','hundredths' and so on.

Example:

Write the decimal seventy-three and twenty six thousandths.

Solution

We write a decimal point for 'and' as "."
We write for seventy-three before 'and' as "73."
We write for twenty-six after 'and' as "0._26"
We see to it that the last digit 6 falls in the thousandths place and write twenty six thousandths as "0.026".
Therefore we write seventy-three and twenty six thousandths as "73.026"

Problem 1:

Write the decimal six hundred forty-two and thirteen hundredths.

Step 1:

We write 'and' as a decimal point "."

Step 2:

We write six hundred forty-two before 'and' as "642."

Step 3:

We write thirteen after 'and' as "0.13"

Step 4:

We see that the last digit 3 is in hundredths place. So thirteen hundredths is "0.13"

Step 5:

Therefore six hundred forty-two and thirteen hundredths is "642.13"

Problem 2:

Write the decimal number one hundred twenty-six and nineteen thousandths.

Step 1:

We write 'and' as a decimal point "."

Step 2:

We write one hundred twenty-six before 'and' as "126."

Step 3:

We write nineteen after 'and' as "0._19"

Step 4:

We see to it that the last digit 9 is in thousandths place. So nineteen thousandths is 0.019.

Step 5:

Therefore one hundred twenty-six and nineteen thousandths is "126.019"

Problem 3:

Write the decimal number one thousand one and one hundred four thousandths.

Step 1:

We write 'and' as a decimal point "."

Step 2:

We write one thousand one before 'and' as "1001."

Step 3:

We write four after 'and' as "0._ _ 4"

Step 4:

We see to it that the last digit 4 is in thousandths place. So four thousandths is 0.004.

Step 5:

Therefore one thousand one and one hundred four thousandths is "1001.004".