Operations on Numbers Expressed Using Scientific Notation

How many times larger is 5 x 10⁷ than 5 x 10²?

• 1 x 10⁶

• 1 x 10⁴

• 1 x 10⁵

• 1 x 10⁹

Add using scientific notation

(5.2 x 10⁷) + (3.01 x 10⁴)

• 5.20301 x 10¹¹

• .520301 x 10⁷

• 5.20301 x 10⁷

• 5.20301 x 10⁸

Multiply (2 x 10⁹)(4 x 10^-4)

• 8 x 10¹³

• 8 x 10³⁶

• 8 x 10⁵

• 8 x 10^-36

Multiply: (3.4 x 10⁵) x 10^-3

• 3.4 x 10^-8

• 3.4 x 10^-2

• 3.4 x 10²

• 3.4 x 10^-15

(20 x 10⁵⁰) / (4 x 10¹⁵)

• 2.4 x 10⁵¹

• 5 x 10⁶⁵

• 8 x 10⁶⁶

• 5 x 10³⁵

Give the difference of (7.2 x 10^-7) - (4.5 x 10^-7)

• 2.7 x 10^-7

• 2.7 x 10⁰

• 1.17 x 10^-7

• 3.3 x 10^-7

Simplify. Write each answer in scientific notation.

5.9 × 10^-² - 0.078 × 10³

• -7.7941 × 10¹

• -7.7941 × 10⁴

• -7.7941 × 10⁷

• -7.7941 × 10¹⁰

(6.33 x 10^-9) - (4.5 x 10^-9)

• 1.83 x 10^-9

• 1.83 x 10^-18

• 1.83 x 10⁰

• 1.83 x 10¹⁸

(1.9 x 10^-9) - (1.7 x 10^-9)

• 0.2 x 10^-18

• 0.2 x 10^-9

• 2 x 10^-18

• 2 x 10^-10

The Diplodocus dinosaur is believed to have become extinct approximately 1.38x10⁸ years ago.  The Oviraptor is believed to have become extinct approximately 7x10⁷ years ago.  How many years were there between the extinction of these two dinosaur types?

• 6.8 x 10⁸

• 6.8 x 10⁹

• 68 x 10⁸

• 6.8 x 10⁷