Scientific Notation and Operations

Multiply:
(3.4 x 10⁵)(1.2 x 10^-3)

• 4.08 x 10^-8
• 4.8 x 10²
• 4.08 x 10²
• 4.08 x 10^-15

Divide:
(6.9 x 10⁷) / (2.3 x 10^-3)

• 3 x 10¹⁰
• 3 x 10⁴
• 3 x 10^-4
• 3 x 10^-11

Write the answer in scientific notation.
7.3 x 10⁵  +   3.7 x 10⁵  =

• 11.0 x 10⁵
• 1.1 x 10¹⁰
• 1.10 x 10¹¹
• 1.1 x 10 ⁶

Which is the smallest?
1.3 x 10²⁰
2.9 x 10²¹
9.5 x 10³²
8.4 x 10¹⁹

• 1.3 x 10²⁰
• 2.9 x 10²¹
• 9.5 x 10³²
• 8.4 x 10¹⁹

Which is the largest?
4.8 x 10^-6 
1.3 x 10²⁰
3.1 x 10^-4
9.2 x 10^-5 
9.5 x 10³²
5.9 x 10^-5
2.9 x 10²¹
8.4 x 10¹⁹

• 9.5 x 10³²
• 3.1 x 10^-4
• 8.4 x 10¹⁹
• 4.8 x 10^-6 

How would you write 0.0005 in scientific notation?

• 50 x 10⁵
• 5 x 10^-4
• 5 x 10⁴
• .5 x 10³

The Statue of Liberty weighs 450,000 pounds. What is this number written in scientific notation?

• 4.5 x 10^-5
• 45 x 10^-4
• 45 x 10⁴
• 4.5 x 10⁵

Find the difference
(3.8 x 10⁴) - (2 x 10³)

• 1.8 x 10⁴
• 1.8 x 10¹
• 3.6 x 10¹
• 3.6 x 10⁴

(3.8×10⁷)×162

• 6.156×10⁹
• 6.156×10⁸
• 615×10⁷
• 615×10⁸

The Earth is approximately 90,000,000 miles from the sun.  How long does it take light from the sun to reach the earth?  Use the speed of light to be approximately 2 x 10⁵ miles per second.

• 4.5 x 10² seconds
• 4.5 seconds
• 2.2 x 10² seconds
• 4.5 x 10¹ seconds