Grade 8 HMH Go Math - Answer Keys Answer keys Chapter 2:Exponents and Scientific Notation; Model Quiz

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Grade 8 HMH Go Math - Answer Keys

Chapter 2:Exponents and Scientific Notation; Model Quiz

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2.1 Integer Exponents

Find the value of each power.

Question 1 (request help)
\(3^{−4}\)

(show solution)

Question 2 (request help)
\(35^ 0\)

(show solution)

Question 3 (request help)
\(4^4\)

(show solution)

Use the properties of exponents to write an equivalent expression.

Question 4 (request help)
\(8^3 \cdot 8^7\)
Type below:

(show solution)

Question 5 (request help)
\(\large\frac{12^6}{12^2}\)
Type below:

(show solution)

Question 6 (request help)
\((10^3)^5\)
Type below:

(show solution)

2.2 Scientific Notation with Positive Powers of 10

Convert each number to scientific notation or standard notation.

Question 7 (request help)
2,000
Type below:

(show solution)

Question 8 (request help)
91,007,500
Type below:

(show solution)

Question 9 (request help)
\(1.0395 \times 10^9\)
Type below:

(show solution)

Question 10 (request help)
\(4 \times 10^2\)
Type below:

(show solution)

2.3 Scientific Notation with Negative Powers of 10

Convert each number to scientific notation or standard notation.

Question 11 (request help)
0.02
Type below:

(show solution)

Question 12 (request help)
0.000701
Type below:

(show solution)

Question 13 (request help)
\(8.9 \times 10^{-5}\)
Type below:

(show solution)

Question 14 (request help)
\(4.41 \times 10^{-2}\)
Type below:

(show solution)

2.4 Operations with Scientific Notation

Perform the operation. Write your answer in scientific notation.

Question 15 (request help)
\(7 \times 10^6 - 5.3 \times 10^6\)
Type below:

(show solution)

Question 16 (request help)
\(3.4 \times 10^4 + 7.1 \times 10^5\)
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(show solution)

Question 17 (request help)
\((2 \times 10^4 )(5.4 \times 10^6)\)
Type below:

(show solution)

Question 18 (request help)
\(\large\frac{7.86\times10^9}{3 \times 10^4}\)
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(show solution)

Question 19 (request help)
Neptune’s average distance from the Sun is \(4.503 \times 109 \text{ km }\). Mercury’s average distance from the Sun is \(5.791 \times 10^7\) km. About how many times farther from the Sun is Neptune than Mercury? Write your answer in scientific notation.
Type below:

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Essential Question

Question 20 (request help)
How is scientific notation used in the real world?
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