Lesson 1.5 Use a Problem Solving Plan

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Presentation transcript:

Lesson 1.5 Use a Problem Solving Plan Essential Question: How can you use a problem solving plan to solve a problem?

Before we start…

Problem Solving Plan 1. READ and UNDERSTAND the problem * What do you know? * What do you need to find out? 2. Develop a PLAN * Have you ever solved a similar problem? * What strategies can you use? * Estimate an answer. 3. SOLVE the problem * Carry out the plan. * Do you need to try another strategy? * What is the solution? 4. LOOK BACK * Did you answer the right question? * Does your answer make sense?

Running You run in a city where the short blocks on north-south streets are 0.1 mile long. The long blocks on east-west streets are 0.15 mile long. You will run 2 long blocks east, a number of short blocks south, 2 long blocks west, then back to your starting point. You want to run 2 miles. How many short blocks should you run?

Cookies You are making cookies for a bake sale and need to make enough cookies to fill 24 boxes containing 6 cookies each. How many dozen cookies do you need to make?

Cell Phone The cellular phone plan you signed up for gives you 400 minutes a month for $35 and charges $0.15 for each additional minute over 400 minutes. How long can you talk on the phone each month and stay within a budget of $45?

Interest You invest $200 into a savings account that earns 2% simple interest. How long will it take to earn $50 in interest?

Speed It takes you half an hour to travel 26 miles to work Speed It takes you half an hour to travel 26 miles to work. What is your average speed?

Camping You are responsible for buying supplies for an upcoming camping trip. You can buy packages of stew that just need water added and then are heated. Each package costs $4.95 and contains enough stew for 2 people. You need to buy enough packages so that you can have stew for 3 days of the trip. There will be 8 people on the trip. How many packages do you need? What is the total cost?

How can you use a problem solving plan to solve a problem?

Ticket Out the Door Solve the problem on a piece of paper (put your name on it) and place it in the box on your way out… You are going to open a certificate of deposit (CD) that earns simple interest. One bank offers a CD in which you must deposit $500 for 3 years with 2% interest. Another bank offers a CD in which you must deposit $250 for 4 years with 3% interest. Which CD will earn more interest?