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

sum of the numbers:   4 3 6. 3 2

                                    2 2 7. 2    

                      [+]                    0. 3 0 1

                                   ............................

                                     663.821

                                    ...........................

But since they are asking the sum in their approximate significant values, we must round off each number to the nearest natural number possible.

The significant value of 436.32 is 436

                                      227.2 is 227

                                      0.301 is 1

So the sum of these numbers is 664

Option b is the correct answer

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Answer 2

Answer:663.8

Explanation:

Answer is 663.8 In exemplar the wrong answer is mentioned. You can check your answer in NCERT pg 29 under the heading of *(2) In addition or subtraction... least decimal places*