Question

The sum of the numbers 436.32, 227.2 and 0.301 in appropriate significant figures is

• A. 663.821
• B. 664
• C. 663.8
• D. 663.82

Answer 1

Answer: (C)

663.8

Answer 2

The arithmetic additions of given numbers is

$\begin{array} { r } 436.32 \\ + \quad 227.2 \\ 0.310 \\ \hline 663.821 \\ \hline \end{array}$

Since the least precise measurement $227.2$ is correct to only one decimal place. Therefore, the final result should be rounded off to 663.8.