## Rounding

#### When calculating significant digits, it is necessary to use proper rounding
technique.

#### The rules of rounding are:

#### a. Round only the final answer.

#### b. Carry extra digits on intermediate calculations.

#### c. Consider only one digit past the last significant digit to determine
how to round the last digit.

#### d. The digit to the right of 5 rounds to an even number.

#### Examples:

####

#### *3.548 rounds to 3.5. (Ignore the 8, just
consider the 4. The 5 remains unchanged.)

#### *3.758 rounds to 3.8. (Ignore the 8, Since
5 rounds to even, the 7 rounds to 8.)

#### *3.458 rounds to 3.4. (Since rounds to even,
the 4 remains because it is even.)

####

*Slichter*