How do you round off to the indicated number of significant figures?

To round to a significant figure:

1. look at the first non-zero digit if rounding to one significant figure.
2. look at the digit after the first non-zero digit if rounding to two significant figures.
3. draw a vertical line after the place value digit that is required.
4. look at the next digit.

What is the number 75.66852 rounded off to 5 significant digits?

What is the number 75.66852 rounded off to 5 significant digits? Explanation: According to the rounding off rules, if the digit to be removed is 5 and the following digit is not zero, then the last remaining digit is increased by one. Hence, the final answer will be “75.669”.

What are the rules in rounding off decimals?

Put simply, if the last digit is less than 5, round the previous digit down. However, if it’s 5 or more than you should round the previous digit up. So, if the number you are about to round is followed by 5, 6, 7, 8, 9 round the number up. And if it is followed by 0, 1, 2, 3, 4 round the number down.

What are the rules for rounding off numbers quizlet?

what are the rules for rounding off numbers? If the first digit to be dropped is less than 5, it and all following digits are dropped. If the first digit to be dropped is 5 or greater, all the following digits are dropped and the value of the last retainined digit is increased by 1.

What is Avogadro’s number rounded to four significant figures?

602,200,000,000,000,000,000,000
For example, Avogadro’s constant (mainly used in Chemistry and Physics) is written as 6.022 × 1023, that is 602,200,000,000,000,000,000,000 (rounded to four significant figures).

How many significant figures does 0.00100 have?

Because the pH is not written to reflect the number of significant figures in the concentration. Notice that there are three sig figs in 0.00100.