1. Addition:
2.7 g + 2.47 g = 5.17 g
2. Significant Digits:
* Rule: The result of addition should have the same number of decimal places as the number with the fewest decimal places in the original numbers.
* Analysis: 2.7 g has one decimal place, and 2.47 g has two decimal places.
* Result: Therefore, the sum should be rounded to one decimal place.
3. Final Answer:
The sum of 2.7 g and 2.47 g, expressed to the correct number of significant digits, is 5.2 g.
