Unit 2, Topic 3 - Concept Check. (Significant Figures)

How many sig figs?

0.00453

• 3

• 5

• 6

How many sig figs?

11.50

• 3

• 4

• 2

How many sig figs?

125,300

• 6

• 5

• 4

How many sig figs?

0.00450890

• 4

• 5

• 6

When adding and subtracting measurements, the answer should contain ____________________ as indicated by the measured numbers.

• the fewest number of decimal places

• the fewest number of significant figures

When multiplying and dividing measurements, the answer should contain ____________________ as indicated by the measured numbers.

• the fewest number of decimal places

• the fewest number of significant figures

Round the following number to 2 sig figs:

0.00106

• 0.0010

• 0.0011

• 0.0016

Round the following number to 3 sig figs:

134,125

• 134,000

• 134

• 134,125

15.28 g + 4.3 g = 19.58 g

How should this answer be reported?

• 19.58 g

• 19.6 g

• 20. g

4.336 cm x 0.75 cm = 3.252 cm²

How should the answer be reported?

• 3 cm²

• 3.3 cm²

• 3.25 cm²