Review on Exponents and Scientific Notation

When a witch is casting a spell on Halloween night, she multiplies the power of her magic by using scientific notation. What does she do with the exponents?

• Multiply them

• Add them

• Keep them the same

• Make them equal

Tags

CCSS.8.EE.A.4

(2 x 10⁹)(4 x 10^-4)

• 8 x 10¹³

• 8 x 10³⁶

• 8 x 10⁵

• 8 x 10^-36

Tags

CCSS.8.EE.A.4

(20 x 10⁵⁰) / (4 x 10¹⁵)

• 2.4 x 10⁵¹

• 5 x 10⁶⁵

• 8 x 10⁶⁶

• 5 x 10³⁵

Tags

CCSS.8.EE.A.4

On Halloween night, a witch casts a spell that multiplies the number of pumpkins in a field by 6 million. However, a wizard counters her spell and reduces the number of pumpkins by 2000. What is the final number of pumpkins in the field? Solve:

• 12 x 10³ pumpkins

• 3 x 10⁹ pumpkins

• 1.2 x 10⁴ pumpkins

• 3 x 10³ pumpkins

Tags

CCSS.8.EE.A.4

A square parking lot has a side of 2.5 x 10⁴ feet. What is the area of the field in scientific notation?

• 62.5 x 10⁵  feet squared

• 6.25 x 10⁴  feet squared

• 6.25 x 10³  feet squared

• 6.25 x 10⁵  feet squared

Tags

CCSS.8.EE.A.4

(5.6x10⁷)
+ (8.1x10⁷)

• 10 x 10⁷

• 13.7 x 10⁷

• -1.37x10⁸

• 1.37 x 10⁸

Tags

CCSS.8.EE.A.4

Write the answer in scientific notation.
(4.1 x 10⁵⁾ +   (5.5 x 10⁶⁾  =

• 5.91 x 10⁶

• 9.6 x 10⁵

• 9.6 x 10¹¹

• 4.65 x 10⁵

Tags

CCSS.8.EE.A.4

Write the answer in scientific notation.
(5 x 10⁸⁾ -  (3.4 x 10⁸⁾  =

• 2.4 x 10⁸

• 2.4 x 10⁰

• 1.6 x 10⁰

• 1.6 x 10⁸

Tags

CCSS.8.EE.A.4

Convert 0.00687 into scientific notation. 

• 6.87 x 10^-3

• 6.87 x 10^-5

• 68.7 x 10³

• 687 x 10^-3

What is .0002 in scientific notation? 

• 2.0 x 10^-2

• 2.0 x 10^-3

• 2.0 x 10^-4

• 2.0 x 10^-5