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Addition and Subtraction with Scientific Notation Answers

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Asia is the largest of the world’s seven continents with an area of approximately square miles. Australia, the smallest continent, has an area of approximately square miles. How much larger is Asia than Australia? Express the answer in scientific notation.

Question illustration
A
square miles
Option A
B
square miles
Option B
C
square miles
Option C
D
square miles
Option D
2
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Add and subtract the values. Express your answer in scientific notation.

Question illustration
A
2.35 times 10 Superscript negative 4
Option A
B
2.67 times 10 Superscript negative 4
Option B
C
8.83 times 10 Superscript negative 3
Option C
D
9.01 times 10 Superscript negative 3
Option D
3

Find the sum of the numbers. Express your answer in scientific notation.

Question illustration
A
6.654 times 10 Superscript 10
Option A
B
8.49 times 10 Superscript 10
Option B
C
6.654 times 10 Superscript 11
Option C
D
8.49 times 10 Superscript 11
Option D
4

Find the difference. Express the answer in scientific notation.

Question illustration
A
8.1 times 10 Superscript 19
Option A
B
0.81 times 10 Superscript 20
Option B
C
8.1 times 10 Superscript 21
Option C
D
0.81 times 10 Superscript 40
Option D
5

Find the difference. Express the answer in scientific notation.

Question illustration
A
1.43 times 10 Superscript 11
Option A
B
9.15 times 10 Superscript 11
Option B
C
1.43 times 10 Superscript 22
Option C
D
9.15 times 10 Superscript 22
Option D
6

Julio measured the weight of a grain of sand and found it to be kg. He also measured the weight of one hair from his eyebrow and found that to be kg. What is the total weight of both objects?

Question illustration
A
kg
Option A
B
kg
Option B
C
kg
Option C
D
kg
Option D
7

Add and subtract the values. Express your answer in scientific notation.

Question illustration
A
6.24 times 10 Superscript 8
Option A
B
7.05 times 10 Superscript 8
Option B
C
3.99 times 10 Superscript 9
Option C
D
4.04 times 10 Superscript 9
Option D
8

Which numbers are written in scientific notation? Check all that apply.

A
0.87 times 10 Superscript 8
Option A
B
15.489 times 10 Superscript 6
Option B
C
10.1 times 10 Superscript negative 12
Option C
D
7.08 times 10 Superscript 6
Option D
E
1.2345 times 10 Superscript negative 1
Option E
9

A pool was filled with gallons from one hose and gallons from another hose. What is the total amount of water in the pool? Express the answer in scientific notation.

Question illustration
A
gallons
Option A
B
gallons
Option B
C
gallons
Option C
D
gallons
Option D
10

Find the sum. Express the answer in scientific notation.

Question illustration
A
1.328 times 10 Superscript 8
Option A
B
1.328 times 10 Superscript 10
Option B
C
13.28 times 10 Superscript 9
Option C
D
13.28 times 10 Superscript 18
Option D

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