How do you round 51.345 to two significant figures?
To round 51.345 to two significant figures, we need to identify the two most significant digits. The two most significant digits are the 5 and the 1. The 3 is the third significant digit, and the 4 and 5 are not significant digits.
To round, we look at the digit to the right of the second significant digit, which is the 3. Since the 3 is less than 5, we round down. This means that we keep the 5 and the 1, and we drop the 3, the 4, and the 5.
Therefore, 51.345 rounded to two significant figures is 51.
Here are some tips for rounding numbers:
- Identify the significant digits in the number.
- Look at the digit to the right of the last significant digit.
- If the digit to the right is less than 5, round down.
- If the digit to the right is greater than or equal to 5, round up.
- If the digit to the right is a 5, round up if the last significant digit is odd. Round down if the last significant digit is even.
