1.31. How many significant figures should be present in the answer of the following calculations?
(i)
(ii) 5 × 5.364
(iii) 0.0125 + 0.7864 + 0.0215
1.31. How many significant figures should be present in the answer of the following calculations?
(i)
(ii) 5 × 5.364
(iii) 0.0125 + 0.7864 + 0.0215
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1 Answer
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1.31. First we need to find the least precise number to find the significant figures.
(i) Least precise number of the calculation
is 0.112Therefore, number of significant figures in the answer = Number of significant figures in the least precise number, i.e. 3
(ii) Least precise number of calculations = 5.364
Therefore, number of significant figures in the answer will be = Number of significant figures in 5.364 = 4
(iii) 0.0125+0.7864+0.0215
Since the least number of decimal places in each term is four, the number of significant figures in the answer will also be 4.
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