1) The document provides examples of solving problems by working backwards. It explains that some problems provide information in a sequence and ask you to find something that happened at the beginning. To solve these, you start at the end and work backwards through the information given.
2) An example problem asks what time Lucy should leave for the bus station if she wants to take a 4:45 bus, it takes 20 minutes to get there, and she wants to arrive 20 minutes early. Working backwards from the end time, the solution is that she should leave at 4:05.
3) The document provides practice problems and prompts students to use the four-step problem solving method and show their work. It includes problems about
![Name _____________________Date ___________<br />Mrs. Labuski & Mrs. Portsmore Per __Work Backwards<br />METHOD 6 –Work Backwards:<br />Some problems give you a sequence of information and ask you to find something that happened at the beginning. To solve a problem like this, you may want to start at the end of the problem and work backwards.<br />Let’s try one: Lucy wants to take a 4:45 bus. It takes her 20 minutes to get to the bus station. She wants to get there 20 minutes early. What time should she leave for the bus station?<br />,[object Object],Jesse was out playing golf last Thursday. On the first six holes, he lost 4 golf balls. On the next six holes he lost one half of the number of golf balls he had then. On the last six holes, he only lost 2 more golf balls. He finished with 4 golf balls. How many did he start with? <br />,[object Object],Name _____________________Date ___________<br />Mrs. Labuski & Mrs. Portsmore Per __Work Backwards HW<br />Use the four-step problem solving method to solve the following. Draw the Four-Step Square on loose-leaf and be sure to show all your work.<br />Claude kept track of what he saw at Point Defiance Zoo. He saw twice as many sharks as dolphins. The number of whales was 6 less than the number of sharks. There were 5 times as many sea lions as there were whales. He saw 20 sea lions. How many did he see altogether? <br />On the quiz show quot;
What Do You Know?quot;
each question is worth four times as much as the previous question. The fourth question is worth $I,600. How much was the first question worth? <br />Add 5 to the mystery number. Then subtract 7. The result is 23. What is the mystery number?<br />Tracy asked her dad how old he was. He told her, “If I add 10 to my age and double the result, I will get 84.” How old is Tracy’s dad?<br />Name _____________________Date ___________<br />Mrs. Labuski & Mrs. Portsmore Per __Work Backwards<br />METHOD 6 –Work Backwards:<br />Some problems give you a sequence of information and ask you to find something that happened at the beginning. To solve a problem like this, you may want to start at the end of the problem and work backwards.<br />Let’s try one: Lucy wants to take a 4:45 bus. It takes her 20 minutes to get to the bus station. She wants to get there 20 minutes early. What time should she leave for the bus station?<br />,[object Object],Jesse was out playing golf last Thursday. On the first six holes, he lost 4 golf balls. On the next six holes he lost one half of the number of golf balls he had then. On the last six holes, he only lost 2 more golf balls. He finished with 4 golf balls. How many did he start with? <br />,[object Object],Name _____________________Date ___________<br />Mrs. Labuski & Mrs. Portsmore Per __Work Backwards HW<br />Use the four-step problem solving method to solve the following. Draw the Four-Step Square on loose-leaf and be sure to show all your work.<br />Claude kept track of what he saw at Point Defiance Zoo. He saw twice as many sharks as dolphins. The number of whales was 6 less than the number of sharks. There were 5 times as many sea lions as there were whales. He saw 20 sea lions. How many did he see altogether? <br />On the quiz show quot;
What Do You Know?quot;
each question is worth four times as much as the previous question. The fourth question is worth $1,600. How much was the first question worth? <br />Add 5 to the mystery number. Then subtract 7. The result is 23. What is the mystery number?<br />Tracy asked her dad how old he was. He told her, “If I add 10 to my age and double the result, I will get 84.” How old is Tracy’s dad?<br />Question 1<br />,[object Object],Question 2<br />,[object Object],Question 3<br />,[object Object],Question 4<br />,[object Object]](https://image.slidesharecdn.com/workbackwards-111006132433-phpapp02/85/Work-backwards-1-320.jpg)
