Chemquest 2
Significant Figures
Ch. 3 Sect. 1
Significant Figures
Every nonzero digit is always significant.
2. Zeros at the beginning of a number are
never significant.
3. Zeros that are between two nonzero
numbers are always significant.
4. Zeros at the end of the number are not
significant unless there is a decimal point
in the number. A decimal anywhere in the
number makes zeros at the end of the
number significant.
1.
Multiplying and Dividing
Count the number of significant figures in
each number.
2. Round you answer to the least number of
significant figures.
1.
Adding and Subtracting
Round to the least specific decimal place of
any number in the problem.
175,398.456
Less specific
Skills Practice 2
1.
2.
3.
4.
5.
6.
7.
8.
325.2
18,000
0.0175
0.790
28,910,000
27
4.9 x 1012
1.86 x 105