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The rules for identifying significant figures when writing or interpreting numbers are as follows:
All non-zero digits are considered significant. For example, 91 has two significant figures (9 and 1), while 123.45 has five significant figures (1, 2, 3, 4 and 5).
Zeros appearing anywhere between two non-zero digits are significant. Example: 101.1203 has seven significant figures: 1, 0, 1, 1, 2, 0 and 3.
Leading zeros are not significant. For example, 0.00052 has two significant figures: 5 and 2.
Trailing zeros in a number containing a decimal point are significant. For example, 12.2300 has six significant figures: 1, 2, 2, 3, 0 and 0. The number 0.000122300 still has only six significant figures (the zeros before the 1 are not significant). In addition, 120.00 has five significant figures since it has three trailing zeros.
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How many significant number can be in 8.09?
With the decimal point, all digits are counted as significant figures. Then, there are 3 significant figures for the given number
How many significant number can be in 12.68?
With a decimal point, all digits for that number are counted. Then, we have 4 significant figures.
How many significant figures are in 1.89 x 103?
The number 1.89 x 10³ has three significant figures. The digits 1, 8, and 9 are all non-zero digits, which are counted as significant. The scientific notation does not affect the number of significant figures in the coefficient.
How many significant figure does 0.022 have?
The number 0.022 has two significant figures. The leading zeros before the digits "2" are not counted as significant; they only indicate the position of the decimal point. Therefore, the significant figures are the "2" and the other "2" that follows it.
How many significant figures does 20.2 have?
3 significant figures.
