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

The correct option is C $663.8$

Finding the sum of all the given quantities

436.32 + 227.2 + 0.301 = 663.821

The final answer must contain the same no of digits after the decimal as the number with the least no of digits after the decimal among those we added (227.2).

0.301 has three significant figures so it will not be counted as the least significant figure.

So, the answer should be 663.8