Scientific Notation Word Problems and Operations

In 1985 Earth had 4.9 ×10⁹ people living on it and in 2005, earth had 6.4 ×10⁹ living on it. How many more people inhabited Earth in 2005 than in 1985?

• 13 x 10⁹

• 1.13 x 10¹⁰

• 1.5 x 10⁸

• 1.5 x 10⁹

Tags

CCSS.8.EE.A.4

The dimensions of an office building are 1.5 x 10² feet by 1.35 x 10³ feet. What is the perimeter of the base of the building, in feet?

• 50 x 10³

• 85 x 10 ⁵

• 00 x 10 ³

• 70 x 10 ⁵

Tags

CCSS.8.EE.A.4

A microgram is equal to 1 x 10 ^-6 grams. How many times greater than a microgram is 1 x 10² grams? 

• 1 x 10^-8

• 1 x 10^-4

• 1 x 10⁴

• 1 x 10⁸

Tags

CCSS.8.EE.A.4

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

Tags

CCSS.8.EE.A.4

The table below shows the debt of the three most populous states and the three least populous states. Part A.) What is the sum of the debts for the three most populous states? Express your answer in scientific notation.

• 1.892 x 10^6

• 1.02 x 10^12

• 1.892 x 10^3

• 1.02 x 10^7

Tags

CCSS.8.EE.A.4

Match the process to the correct way to solve

• Divide the decimals, SUBTRACT exponents

• Adding and Subtracting with Scientific Notation

• Multiply the decimals, ADD the exponents

• Multiplying with Scientific Notation

• Make the exponents MATCH, +/- decimals

• Dividing with Scientific Notation

Tags

CCSS.8.EE.A.4

Match the following

• subtract the exponents

• adding scientific notation

• exponents must match

• LARS

• Left, Add

  Right, Subtract

• Scientific notation

• add the exponents

• multiplying scientific notation

• must be written between 1 and 10

• dividing scientific notation

Tags

CCSS.8.EE.A.4

The US spends an average of 1.02x10⁴ dollars on each student per year.  There are about 7.6x10⁷ students in the US.  About how much money total is spent on students per year?

• 7.752 x 10¹¹

• 7.752 x 10²⁸

• 8.62 x 10¹¹

• 8.62 x 10²⁸

Tags

CCSS.8.EE.A.4

As part of a community service project, a class planted 7x10⁵  trees in a year.  If there are 3.5x10³ students in the school, how many trees did each student plant?

• 2 x 10⁸

• 2 x 10²

• 3.5 x 10⁸

• 3.5 x 10²

Tags

CCSS.8.EE.A.4

A computer's hard disk drive holds 8 x 10⁷ bytes of information.  If Jill buys an extra memory stick that holds 3 x 10⁶ bytes of information, how much memory will the computer hold?

• 11 x 10¹³

• 11 x 10⁷

• 8.3 x 10¹³

• 8.3 x 10⁷

Tags

CCSS.8.EE.A.4