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To add decimal numbers, write them with decimal points below one another.
E.g. To add 6.7 + 3.9 + 4.6 write the decimal numbers with decimal
points beneath one another as follows:
Note:
The decimal point in the answer is lined up with the decimal points in
the numbers being added.
Zeros at the End of a Decimal
The value of a decimal number is not altered when zeros are placed at the
end of a number.
For example, the number 8 can be written as 8.0, 8.00, 8.000, … and so
on.
The number 12.7 can be written as 12.70, 12.700, 12.7000, … and so on.
We use this fact to add decimals, as illustrated in the following
example.
Example 7
Calculate 5.84 + 8 + 12.79.
Solution:
To add the given decimal numbers, insert zeros so that all of the numbers
have the same number of decimal places and write the numbers with decimal
points below one another.
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