Question

The result of the following addition,
3.0560 + 0.0348 + 5.340 upto correct significant figures is?

(1) 8.4308

(2) 8.43

(3) 8.431

(4) 8.4​

Answer 1

1) 8 .4308 is your correct answer

Answer 2

First of all, let's start with the number of significant figures in the given terms.

3.0560 has 5 significant figures

0.0348 has 3 significant figures

5.340 has 4 significant figures.

The least decimal count number is 5.340, Hence our result should also have 3 decimal places.

Adding the terms,

3.0560 + 0.0348 + 5.340 = 8.4308

Since, We should report only 3 decimal places.

To remove 8 at the end, We add 1 to the decimal, which results is 8.431

Thus, 8.431 is the required answer.