Example 1. Example 2. Example 3. Example 4. Eureka Math Grade 8 Module 1 Lesson 8 Exercise Answer KeyExercise 1. Exercise 2. The average number of students attending a middle school in New York is 8×〖10〗2. How many times greater is the overall number of K–12 students compared to the average number of middle school students? Exercise 3. Exercise 4. Exercise 5 If the average American lives about 80 years (or about 30,000 days), how many total breaths will a person take in her lifetime? Eureka Math Grade 8 Module 1 Lesson 8 Problem Set Answer KeyStudents practice estimating size of quantities and performing operations on numbers written in the form of a single-digit integer times a power of 10. Question 1. Question 2. a. What does the answer on her screen mean? Explain how you know. Answer: The answer means 9×1010. This is because: (300 000)2=(3×105)2 =32×(105 )2 =9×1010 b. Given that the U.S. has approximately 4 million square miles of land, is this a reasonable goal for conservationists? Explain. Question 3. Question 4. Eureka Math Grade 8 Module 1 Lesson 8 Exit Ticket Answer KeyMost English-speaking countries use the short-scale naming system, in which a trillion is expressed as 1,000,000,000,000. Some other countries use the long-scale
naming system, in which a trillion is expressed as 1,000,000,000,000,000,000,000. Express each number as a single-digit integer times a power of ten. How many times greater is the long-scale naming system than the short-scale? Eureka Math Grade 8 Module 1 Lesson 8 Sprint Answer KeyApplying Properties of Exponents to Generate Equivalent Expressions—Round 1 Answer: Applying Properties of Exponents to Generate Equivalent Expressions—Round 2 Directions:
Simplify each expression using the laws of exponents. Use the least number of bases possible and only positive exponents. When appropriate, express answers without parentheses or as equal to 1. All letters denote numbers. Answer: |