Texas Go Math Grade 8 Module 2 Answer Key Scientific Notation

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Texas Go Math Grade 8 Module 2 Answer Key Scientific Notation

Essential Question
How can you use scientific notation to solve real-world problems?

Texas Go Math Grade 8 Module 2 Are You Ready? Answer Key

Complete these exercises to review skills you will need for this chapter.

Write each exponential expression as a simplified number.

Question 1.
10² _______
Answer:
10² Given
10 * 10 = 100.00 Evaluate

Question 2.
10³ _______
Answer:
10³ Given
10 * 10 * 10 = 1,000.00 Evaluate

Question 3.
10⁵ _______
Answer:
10⁵ Given
10 * 10 * 10 * 10 * 10 = 100,000 Evaluate

Question 4.
10⁷ _______
Answer:
10⁷ Given
10 * 10 * 10 * 10 * 10 * 10 * 10 = 10,000,000.00 Evaluate

Find each product or quotient.

Question 5.
45.3 × 10³
Answer:
45.3 * 10³ Identify the number of zeros in the power of 10
45.3 * 1,000 When multiplying, move the decimal point to the right the same number of places as the number of zeros
45,300

Question 6.
7.08 ÷ 10²
Answer:
7.08 ÷ 10² Identify the number of zeros in the power of 10
7.08 ÷ 100 When dividing, move the decimal point to the left the same number of places as the number of zeros.
0.0708

Question 7.
0.00235 × 10⁶
Answer:
0.00235 × 10⁶ Identify the number of zeros in the power of 10

0.00235 × 1,000, 000 When multiplying, move the decimal point to the right the same number of places as the number of zeros
2,350

Question 8.
3,600 ÷ 10⁴
Answer:
3600 ÷ 10⁴ Identify the number of zeros in the power of 10

3600 ÷ 10000 When dividing, move the decimal point to the left the same number of places as the number of zeros.
0.36

Question 9.
0.5 × 10²
Answer:
0.5 × 10² Identify the number of zeros in the power of 10
0.5 × 100 When multiplying, move the decimal point to the right the same number of places as the number of zeros
50

Question 10.
67.7 ÷ 10⁵
Answer:
67.7 ÷ 10⁵ Identify the number of zeros in the power of 10
67.7 ÷ 100000 When dividing, move the decimal point to the left the same number of places as the number of zeros.
0.000677

Question 11.
0.0057 × 10⁴
Answer:
0.0057 × 10⁴
Identify the number of zeros in the power of 10
0.0057 × 10,000 When multiplying, move the decimal point to the right the same number of places as the number of zeros
57

Question 12.
195 ÷ 10⁶
Answer:
195 ÷ 10⁶ Identify the number of zeros in the power of 10
195 ÷ 1000000 When dividing, move the decimal point to the left the same number of places as the number of zeros.
0.000195

Texas Go Math Grade 8 Module 2 Reading Start-Up Answer Key

Visualize Vocabulary

Use the ✓ words to complete the Venn diagram. You can put more than one word in each section of the diagram.

Understand Vocabulary

Complete the sentences using the preview words.

Question 1.
A number produced by raising a base to an exponent is a _______
Answer:
A number produced by raising a base to an exponent is a power.

Question 2.
____ is a method of writing very large or very small numbers by using powers of 10.
Answer:
Scientific notation is a method of writing very large or very small numbers by using powers of 10.

Question 3.
A ____ is any number that can be expressed as a ratio of two integers.
Answer:
A rational number is any number that can be expressed as a ratio of two integers.