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Question

Taking into account of the significant figures, what is the value of 9.99 m – 0.0099 m? \[NEET 2020 Phase I\]

Options

Choose one · Correct answer highlighted

Explanation

Significant figures depend on least precise measurement. For 9.99 m (2 decimal places) minus 0.0099 m (4 decimal places), result 9.9801 m must be rounded to 2 decimal places as per subtraction rule in NCERT. So 9.98 m is correct, retaining 3 significant figures. Thus 9.98 m follows significant figure rules.