Question

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

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

Answer 1

The correct option is C $663.8$

On arithmetic addition, we get,
$436.32+227.2+0.301=663.821$
We know that in addition or subtraction, the final answer should have as many decimal places as in given data with minimum decimal places.
Here, $227.2$ have the minimum number of decimal place equal to one. Therefore, the final answer should have one decimal place.
On rounding off $663.821$ to one decimal place, we get, $663.8$