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McGraw Hill My Math Grade 5 Chapter 6 Lesson 7 Answer Key Problem-Solving Investigation: Look for a Pattern

All the solutions provided in  McGraw Hill My Math Grade 5 Answer Key PDF Chapter 6 Lesson 7 Problem-Solving Investigation: Look for a Pattern  will give you a clear idea of the concepts.

McGraw-Hill My Math Grade 5 Answer Key Chapter 6 Lesson 7 Problem-Solving Investigation: Look for a Pattern

2. Plan Look for a pattern. Extend the pattern to find the final.

3. Solve Multiply the cost of the item by ______________ to find the discount Subtract the discount from the ______________ to find the final cost $34.70 × _____________ = _____________ The discount is _____________. $34.70 – _____________ = _____________ Hank will pay _____________.

Practice the Strategy

Apply the Strategy

Solve each problem by looking for a pattern.

Question 4. Mathematical PRACTICE Look for a Pattern Describe the pattern below. Then find the next three numbers. 0.03, 0.3, 3, 30, __________, ___________, ____________ Answer: 0.03, 0.3, 3, 30, 300, 3000, 30000 Explanation: Each pattern above can be found by multiplying 10 to the previous number in the sequence. 0.03 x 10 = 0.3 0.3 x 10 = 3 3 x 10 = 30 30 x 10 = 300 300 x 10 = 3000 3000 x 10 = 30000

Question 5. Describe the pattern below. Then find the next two numbers. . 784.5, 78.45, 7.845, ________, ____________ Answer: 0.7845 0.7845, 0.07845, 0.007845 Explanation: Each pattern above can be found by multiplying 0.1 to the previous number in the sequence. 78.45 x 0.1 = 78.45 78.45 x 0.1 = 7.845 7.845 x 0.1 = 0.7845 0.7845 x 0.1 = 0.07845 0.07845 x 0.1 = 0.007845

Review the Strategies Use any strategy to solve each problem.

• Make a table.
• Choose an operation.
• Act it out.
• Draw a picture.

Question 6. Mathematical PRACTICE if Plan Your Solution Samuel will arrive at the airport on the first plane after 10 A.M. Airplanes arrive every 50 minutes beginning at 6 A.M. When will Samuel’s plane arrive? Answer: 10.10 A. M. Explanation: Samuel will arrive at the airport on the first plane after 10 A.M. Airplanes arrive every 50 minutes beginning at 6 A.M. Each pattern above can be found by adding 50 minutes to the previous time. 6:00 A.M. + 50 min = 6:50 A.M. 6:50 A.M. + 50 min = 7:40 A.M. 7:40 A.M. + 50 min = 8:30 A.M. 8:30 A.M. + 50 min = 9:20 A.M. 9:20 A.M. + 50 min= 10:10 A.M.

Question 7. On Serena’s tenth birthday, her mom was 3 times Serena’s age. How old will Serena and her mom be when her mom’s age times 0.5 will equal Serena’s age? Answer: Serena 20 years, Mom 40 years. Explanation: On Serena’s tenth birthday, her mom was 3 times Serena’s age. Mom age 10 x 3 = 30 years. Serena and her mom be when her mom’s age times 0.5 will equal Serena’s age. Serena’s age = 10 x 0.5 = 20 years. Mom’s age = 30 + 10 = 40 Years.

Question 8. Mindy read 8 pages of her book the first day, 15 pages the second day, and 22 pages the third day. If the pattern continues, how many pages of her book will she read on the sixth day? Answer: 43 pages. Explanation: Mindy read 8 pages of her book the first day, 15 pages the second day, 22 pages the third day. The pattern continues by adding 7 pages each day to the previous day. Number of pages of her book she read on the sixth day, fourth day she reads 22 + 7 = 29 pages. fifth day she reads 29 + 7 = 36 pages. sixth day she reads 36 + 7 = 43 pages.

Question 9. A 1-mile hiking path has signs placed every 240 feet. There are signs placed at the beginning and end of the mile. How many signs are there? (Hint: 1 mile = 5,280 feet) Answer: 22 signs. Explanation: A 1-mile hiking path has signs placed every 240 feet. 1 mile = 5,280 feet. There are signs placed at the beginning and end of the mile. Number of signs placed in 5280 ÷ 240 = 22 signs.

Question 10. Jada lives in a city that has an area of 344.6 square miles. Her friend lives in a town that is one-tenth, or 0.1, that size. What is the area of her friend’s town? Answer: 34.46 square miles. Explanation: Jada lives in a city that has an area of 344.6 square miles. Her friend lives in a town that is one-tenth, or 0.1, that size. The area of her friend’s town is 344.6 x 0.1 = 34.46 square miles.

McGraw Hill My Math Grade 5 Chapter 6 Lesson 7 My Homework Answer Key

Problem Solving

Question 1. Harold has 4 classes each school morning. Each class is 1 hour long, and there are 10 minutes between classes. The first class starts at 8:00 A.M. What time does the fourth class end? Answer: Fourth class ends at 12:40 P.M. Explanation: Harold has 4 classes each school morning. Each class is 1 hour long, and there are 10 minutes between classes. The first class starts at 8:00 A.M. By adding 1:10 minutes to the starting class we find the time of four classes. Time duration of first class is, 8:00 A.M. + 1:10 A.M. = 9:10 A.M. Time duration of second class is, 9:10 A.M. + 1:10 A.M. = 10:20 A.M. Time duration of third class is, 10:20 A.M. + 1:10 A.M. = 11:30 A.M. Time duration of fourth class is, 11:30 A.M. + 1:10 A.M. = 12:40 P.M.

Question 2. Mr. Moore read 25 pages of a book on Monday. He read 32 pages on Tuesday, 39 pages on Wednesday, and 46 pages on Thursday. If this pattern continues, how many pages will Mr. Moore read on Sunday? Answer: 67 pages. Explanation: Mr. Moore read 25 pages of a book on Monday. He read 32 pages on Tuesday, 39 pages on Wednesday, 46 pages on Thursday. The pattern continues by adding 7 pages every day to the previous pages. No. of pages read on Friday 46 + 7 = 53 pages. No. of read on Saturday 53 + 7 = 60 pages. No. of pages read on Sunday 60 + 7 = 67 pages.

Question 3. Mathematical PRACTICE Look for a Pattern Describe the pattern below. Then find the next two numbers. 547, 54.7, 5.47, 0.547, ___________, _________ Answer: 0.0547 0.0547, 0.00547, 0.000547 Explanation: Each pattern above would be found by dividing 10 to the previous term . 0.547 ÷ 10 = 0.0547 0.0547 ÷ 10 = 0.00547 0.00547 ÷10 = 0.000547

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