Accuracy/ Precision
& Sig Figs
& Sig Figs
How many significant figures does 609 have?
3
12.9 - 4.23
8.7
45 x 3
100
0.00056
5.6 x 10-4
2.31 x 102 + 5.4 x 103
5.6 x 103
How many significant figures does 0.0004 have?
1
5,050 + 400
5,500
504 / 0.009
270
2.7 x 102
7.8 x 104 - 4.3 x 103
7.4 x 104
How many significant figures does 800 have?
1
56.09 - 0.0439
56.05
7.5 x 209
16,000
6.7 x 10-4
0.00067
2.31 x 102 x 5.4 x 103
1.2 x 106
How many significant figures does 3,000.0 have?
5
123 + 40
160
8.75 / 5.321
1.64
9.2 x 103
9,200
7.8 x 104 / 4.3 x 103
1.8 x 101
Define accuracy & precision.
Accuracy- how close a measurement or attempt is to the actual or target value
Precision-how consistent our results are regardless of proximity to actual target
78,000 + 0.9
78,001
43,700 / 1,234
3.54
How many sig figs does 3.45 x 102 have?
3
Name the four rules for identifying significant figures.
1. 1-9 are significant
2. middle zeros are significant
3. leading zeros are never significant
4. trailing zeros are significant if their is a decimal