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Kids Math

Adding and Subtracting Decimals

Adding Decimals

When adding numbers with decimals the most important thing is to line up the decimal points of the numbers you are adding. If you do this, adding decimals is just like normal adding.

Here are some simple steps you can follow: Examples:

1) 12 + 7.05 + .12 = ?

12.00
7.05
+ 0.12
19.17


See how the decimal points all line up and how we added in zero's after the 12 and before .12 to make them line up easier.

2) 2.82 + 9.007 + 6 = ?

2.820
9.007
+ 6.000
17.827


Subtracting Decimals

Subtracting decimals works exactly like adding decimals. Well, except for the subtracting part. Just like when adding decimals, the most important thing is to keep your decimal points lined up. Remember you can add in zeros to the right and to the left of the decimal point if it helps you to line things up.

Example:

1) 43.598 - 3.4 = ?

43.598
- 3.400
40.198


2) 315.772 - 55.498 = ?

315.772
- 55.498
260.274


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