## Answers

The answer depends on the number of significant figures required for the question. This would need to be stated.

There are different ways of stating the level of accuracy

We add the numbers as usual to get

The result should be

#### Explanation:

When adding or subtracting measurements (numbers), the result must have the same number of decimal places as the number in the problem with the fewest decimal places.

However, the answer must be given to the correct number of decimal places, in this case

So the result of the addition of

For more information and practice, go to this website:

http://www.chemteam.info/SigFigs/SigFigMath-AddSub.html