clarificaition of sig figs

[josmit_1D]

can someone reexplain to me the rule significant figure rule for zeros?

[chemboi]

From http://chemistry.bd.psu.edu/jircitano/sigfigs.html

"Non-zero digits are always significant.
Any zeros between two significant digits are significant.
A final zero or trailing zeros in the decimal portion ONLY are significant"

[Melvin Reputana 1L]

Here are some rules about significant figures:

1) Non-zero numbers are always significant (ex: 72.3 = 3 significant figures)

2) Zeroes between non-zero numbers are always significant (ex: 60.5 = 3 significant figures)

3) Zeroes at the end of a number and to the right of a decimal are significant. They are assumed to be measured numbers. (ex: 123.00 = 5 significant figures)

4) Zeroes before (to the left of) non-zero numbers are NOT significant. They are not actually measured but are place holders. (ex: 0.0253 = 3 significant figures)

[Karina Kong 2H]

If there is a 0 at the end of the number, or multiple 0's, those 0's are not significant. For example, in the number 200, there is only one sig fig which is 2. If there is a decimal point after the 200, such as 200., there would be three sig figs. If there is a 0 in the middle of the number such as the number 1001, there would still be four sig figs.