Carry out the following calculation, making sure that your answer has the correct number of significant figures:

Question

7.80 g divided by 15.9 g minus 8.37 g

Answer 1

The answer would be -7.879.

7.80/15.9=0.490

0.490-8.37=-7.880

Here are the rules:

1.) For multiplication/division the LEAST number of significant figures in any number of the problem determines the number of significant figures in the answer.

2.) For adding and subtracting your final answer may have no more significant figures to the right of the decimal than the LEAST number of significant figures in any number in the problem.

Hope that helps