Sig Figs and Scientific Notation

How many significant figures does the following number have: 0.998005

• 9
• 10
• 6
• 5

How many significant figures does 1.90 have?

• 2

• 4

• 6

• 8

Round 0.010229 to four sig figs

• 1022
• 1023
• 0.01023
• 0.01022

Round 1009 to three sig figs

• 100
• 101
• 1010
• 1000

Round 1047.78 to three sig figs

• 104
• 105
• 1050
• 1050.00

1145.678 + 4.56 + 623.9789 + 78.1 = ? (Use significant figures!)

• 1852.3
• 2000
• 1952.3
• 1853.5

Solve & Round to Correct Sig Figs.
100 / 2.0 = 

• 50
• 50.
• 50.0
• 50.00

Solve & Round to Correct Sig Figs.
4.5 x 2.34 = 

• 11
• 10.52
• 10.5
• 10

1345.567 / 23.56 = ? (Use significant figures!)

• 57.11
• 58.11
• 56.75
• 83.49

Express 7.89 x 10^-8 in common notation.

• 0.0000000789
• 0.789
• 0.00000789
• 0.000000000789