## How do you round sig figs when adding?

Adding or subtracting: Round the sum or difference to the same number of decimal places as the measurement with the fewest decimal places. Rounding like this is honest, because you’re acknowledging that your answer can’t be any more precise than the least-precise measurement that went into it.

**When adding numbers the sum should be rounded so that the final digit is in the same place as the?**

For addition and subtraction problems, the answer should be rounded to the same number of decimal places as the measurement with the least number of decimal places. The sum of the above masses would be properly rounded to a result of 21.9 g.

### What are the rounding rules for addition?

Here’s the general rule for rounding:

- If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up. Example: 38 rounded to the nearest ten is 40.
- If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down. Example: 33 rounded to the nearest ten is 30.

**What is a number to 4 significant figures?**

Zeros to the right of the last non-zero digit (trailing zeros) in a number with the decimal point are significant if they are within the measurement or reporting resolution. 1.200 has four significant figures (1, 2, 0, and 0) if they are allowed by the measurement resolution.

## Which of the following number is 4 significant digit number?

The first zero is known with certainty and the final zero while not known with certainty is still significant. Thus, 4.000 has 4 significant figures.

**When adding numbers the sum should be rounded so that?**

For addition and subtraction problems, the answer should be rounded to the same number of decimal places as the measurement with the least number of decimal places. The sum of the above masses would be properly rounded to a result of 21.9 g. Let’s take a look at another example below.