Question

Taking into account of the significant figures, what is the value of $9.99 \,m - 0.0099 \,m$ ?

• A. 9.9801 m
• B. 9.98 m
• C. 9.980 m
• D. 9.9 m

Answer 1

Answer: (B)

9.98 m

Answer 2

$9.99 m -0.0099 m =9.9801 m$
But our answer, Should have same no. of significant figures, as the least accurate number.
$\therefore$ Ans $=9.98 m$.