Significant Figures in Subtraction – Rankers Physics
Topic: Unit And Dimensions
Subtopic: Error Analysis

Significant Figures in Subtraction

Taking into account of the significant figures, value of \(9.99\text{ m} - 0.0099\text{ m}\) is
\(9.9801\text{ m}\)
\(9.98\text{ m}\)
\(9.980\text{ m}\)
\(9.9\text{ m}\)

Solution:

When subtracting, the result must be rounded off to the least number of decimal places in any of the terms. Here, \(9.99\) has two decimal places, so \(9.9801\) is rounded to \(9.98\text{ m}\).

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