The answer depends on what operations were used. There should normally not be more significant figures in the answer than in any of the numbers used in the calculation.
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The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
The number of significant figures should be equal to the significant figures in the least precise measurement.
To determine the correct number of significant figures in the final answer for the calculation (67.31 - 8.6 + 212.198), you first perform the subtraction and addition operations. The result of the subtraction (67.31 - 8.6) is 58.71, which has four significant figures. Adding 212.198 to 58.71 yields 270.908, which also has four significant figures. Therefore, the final answer should be rounded to four significant figures: 270.9.
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
Two significant figures the measurment 0.0255 g should be reported as 0.026g