Round the value 2.55 off to 2 significant digits.

Step-by-step solution

The given number is 2.55 . To round it off to 2 significant digits, the digit to be dropped is 5 . According to the rules of rounding off, if the digit to be dropped is 5 and it is not followed by any non-zero digits, the preceding digit is increased by 1 if it is odd, and left unchanged if it is even. In 2.55 , the preceding digit is 5 , which is an odd number. Therefore, the preceding digit is increased by 1 . Thus, 2.55 rounded off to 2 significant digits is 2.6 .