Question

2.65986 to four significant figures

Answer 1

Answer:

2.65986 rounds upto 2.6599 rounds upto 2.660

Explanation:

Rules of rounding off:

1. If the digit to be dropped is greater than 5 so we add one to the second last digit . Example: 12.36 rounds upto 12.4.

2. If the digit to be dropped is less than 5 so we just drop the last digit. Example: 12.34 rounds upto 12.3.

3. If the digit to be dropped is 5 then two possible situations arise due to odd and even nature of digit.

(i) If the digit before 5 is odd then we add 1 to the second last digit. Example: 12.35 rounds upto 12.4.

(ii) If the digit before 5 is even then we just drop the last digit. Example: 12.365 rounds upto 12.36.