Significant Figure Review

Accuracy/ Precision& Sig Figs

100

How many significant figures does 609 have? 

3 

200

How many significant figures does 0.0004 have? 

1

300

How many significant figures does 800 have? 

1

400

How many significant figures does 3,000.0 have?

5

500

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

Addition & Subtraction

100

12.9 - 4.23

8.7

200

5,050 + 400

5,500

300

56.09 - 0.0439

56.05

400

123 + 40

160

500

78,000 + 0.9

78,001

Multiplication & Division

100

45 x 3

100

200

504 / 0.009

60,000

300

7.5 x 209

16,000

400

8.75 / 5.321

1.64

500

43,700 / 1,234

3.54

Scientific Notation

100

0.00056

5.6 x 10^-4

200

270

2.7 x 10²

300

6.7 x 10^-4

0.00067

400

9.2 x 10³

9,200

500

How many sig figs does 3.45 x 10² have? 

3

Scientific Notation Calculations

100

2.31 x 10² + 5.4 x 10³

5.6 x 10³

200

7.8 x 10⁴ - 4.3 x 10³

7.4 x 10⁴

300

2.31 x 10² x 5.4 x 10³

1.2 x 10⁶

400

7.8 x 10⁴ / 4.3 x 10³

1.8 x 10¹

500

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