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Decimal zeroes at the left (beginning, leading) side: 0.00012300004440000

(the middle 0000 are certainly significant, the right ones (behind '444') are also significant, if not then they should be wiped out)

Q: When is a zero none significant?

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Only one of them is significant. The leading zero (zero to the left) is not significant. The trailing zero (rightmost) is significant. To recap, only the zero following the seven is significant. See the related links for a really good article on significant digits.

0.7 has one significant figure. Any non-zero digit is significant (165 has three significant figures). Any zero between non-zero digits is significant (304 has three significant figures). Any zero to the right of a non-zero digit in a number which includes a decimal point is significant (10,000 has one significant figure, .0001 has one significant figure, but 100.0 has four significant figures, as does 0.001000). In this case, only the 7 is significant.

none none

They are all significant figures. A significant figure is any non-zero digit or any embedded or trailing zero. Leading zeros are not significant.

Three significant figures. A significant figure is any non-zero digit or any embedded or trailing zero. Leading zeros are not significant.

Related questions

All none zero numbers are significant.... therefore in 51.223 there are 5.

3, one of the rules is counting the Zero between none zero numbers

There are six significant figures in the measurement of 45.0300 mm. All non-zero digits and zeros between them are significant, as well as any zero to the right of a decimal point.

It has no significant zero because It is a leading zero

Any non-zero digit, if it appears in the decimal representation of a number, is significant. A zero is significant if it is not a leading zero.

Only one of them is significant. The leading zero (zero to the left) is not significant. The trailing zero (rightmost) is significant. To recap, only the zero following the seven is significant. See the related links for a really good article on significant digits.

0.7 has one significant figure. Any non-zero digit is significant (165 has three significant figures). Any zero between non-zero digits is significant (304 has three significant figures). Any zero to the right of a non-zero digit in a number which includes a decimal point is significant (10,000 has one significant figure, .0001 has one significant figure, but 100.0 has four significant figures, as does 0.001000). In this case, only the 7 is significant.

none none

four The one and five are automatically significant because they are non-zero digits. The first zero is significant because it is between two other significant figures, and the trailing zero is significant because it comes after a decimal point.

Two significant figures. A significant figure is any non-zero digit or any embedded or trailing zero. Leading zeros are not significant.

Four significant figures. A significant figure is any non-zero digit or any embedded or trailing zero. Leading zeros are not significant.

Six significant figures. A significant figure is any non-zero digit or any embedded or trailing zero. Leading zeros are not significant.