Question

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

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

Answer 1

The correct option is C 663.8

Rule: In addition or subtraction, the final result should retain as many decimal places as are there in the number with the least decimal places.
Arithmetic addition $=663.821$
But least precise measurement $227.2,$ is correct to only one decimal place.
So final result $=663.8$