Scientific Notation and Significant Figures

How many significant figures does 1.90 have?

• 2

• 3

• 4

• 8

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.
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

Multiply (2.45 x 10⁸) x (8.78 x 10⁶) and express in scientific notations.

• 2.15 x 10¹⁵

• 2.15 x 10¹⁴

• 2.10 x 10¹⁴

• 2.10 x 10¹⁵

How many significant figures does the following number have: 0.002040

• 6
• 4
• 3
• 2

Which of the following measurements contains two significant figures?

• 0.00400 L
• 0.00404 L
• 0.00044 L
• 0.00440 L

The number of significant figures in: 405,000

• 6

• 5

• 4

• 3