Question 1

When Do Zeros Count as Significant Figures?

Accepted Answer

Zeros between nonzero digits and trailing zeros with a decimal count; leading zeros do not count.

Question 2

How do I Count Sig Figs in 0.002040?

Accepted Answer

0.002040 has 4 significant figures (2, 0, 4, and the trailing 0 after the decimal).

Question 3

What Rule Do I Use for Addition and Subtraction with Sig Figs?

Accepted Answer

For addition and subtraction, round the result to the least number of decimal places among the inputs.

Question 4

What Rule Do I Use for Multiplication and Division with Sig Figs?

Accepted Answer

For multiplication and division, round the result to the least number of significant figures among the inputs.

Question 5

How do I Round 2648 to three Significant Figures?

Accepted Answer

2648 rounded to 3 significant figures is 2.65×10^3 (or 2650 in standard form).

Question 6

How Many Significant Figures in 100, 100.0, and 100.00?

Accepted Answer

100 has 1 significant figure, 100.0 has 4 significant figures, and 100.00 has 5 significant figures.

Question 7

Does Scientific Notation Change the Number of Significant Figures?

Accepted Answer

No. Scientific notation does not change significant figures; count only the digits in the coefficient.

Need help with a calculator, guide, or rounding question? We are here to help.

How can you contact us?