0.999
All leading zeros are non-significant.
1,0000
1.000
0.999
Three. All non-zero digits are significant, all zeroes between other digits, and all digits to the right of the decimal. The reason for this is that if this is rounded off, it apparently is rounded off to the nearest tenth, otherwise the tenth place would not be shown. if it were rounded off to the unit, it would read 39, not 39.0 ■
9,990 to 3 s.f., or 9,990 (3 s.f.) or 9,990
Three significant digits.
1,040 to 3 s.f., or 1,040 (3 s.f.) or 1,040.
Three - zeros between significant digits are significant.
323.565 rounded to three significant digits is 323.56
2.99 rounded to three significant digits is 2.96 2.99 rounded to two significant digits is 3.0
31500
0.0570
16.3
6.71 is 6.7050 is rounded to three significant figures.
Three. All non-zero digits are significant, all zeroes between other digits, and all digits to the right of the decimal. The reason for this is that if this is rounded off, it apparently is rounded off to the nearest tenth, otherwise the tenth place would not be shown. if it were rounded off to the unit, it would read 39, not 39.0 ■
There are three rules that are used when rounding to a desired number of significant digits (figures): 1. All digits that are not zero, are significant 2. In a number that does not have a decimal point, all zeros between two non-zero digits are significant digits 3. In a number that has a decimal point, all zeros after the leftmost non-zero digit are significant Examples: 12345 rounded to 3 significant digits: 12300, or 1.23 x 104 12.345 rounded to 3 significant digits: 12.3, or 1.23 x 101 0.012345 rounded to 3 significant digits: 0.0123, or 1.23 x 10-2 0.012045 rounded to 3 significant digits: 0.0120, or 1.20 x 10-2 In the last example the zero after 2 is significant. That is the reason for keeping it in the result when rewriting it in powers of 10 notation.
9,990 to 3 s.f., or 9,990 (3 s.f.) or 9,990
0.00909 has three significant digits.
Three significant digits.
There are three significant digits in 3.56.