Transcript Word Up!
February 25, 2011 Do you know your word problems? Agenda • • • • • Warm-Up Review of Yesterday Identifying Key Words Understanding Word Problems Practicing with Word Problems Completing the Exit Ticket Let’s Go! Warm-Up You have 2 minutes to complete the following questions? How can 4( 3+9) be expressed using the distributive property? A. 4(3) + (4+9) B. 4(3) + 4(9) C. 4+9= 9+4 D. (4+3) X (4+9) What is (x + y) + z if x = 21, y = 18, and z = 6? A. 42 B. 41 C. 45 D. 43 How did you do? How can 4( 3+9) be expressed using the distributive property? A. 4(3) + (4+9) B. 4(3) + 4(9) C. 4+9= 9+4 D. (4+3) X (4+9) What is (x + y) + z if x = 21, y = 18, and z = 6? A. 42 B. 41 C. 45 D. 43 Identifying Key Words • Today, you are going to learn one strategy to understanding word problems. Let’s take a look at our Key Words for Solving Word Problems handouts. • In the next slides you will be given phrases from word problems. Using your Key Words handout determine the mathematical operation. Your teacher will call on you for the correct answer. You must give the key word and tell the mathematical operation. Let’s Go! How many books does she have in all? • What is the key word? • What is the operation? How many books does she have in all? • What is the key word? –in all • What is the operation? –addition There are 9 buses with 40 scholars. How many scholars are there total? • What is the key word? • What is the operation? There are 9 buses with 40 scholars. How many scholars are there total? • What is the key word? –total • What is the operation? –multiplication My car gets 32 miles per gallon. How many gallons will it take to go 500 miles? • What is the key word? • What is the operation? My car gets 32 miles per gallon. How many gallons will it take to go 500 miles? • What is the key word? –per • What is the operation? –division Your Turn • Take 2 minutes to make up a word phrase for a multiplication problem. • Your teacher will call on a few of you to share your phrase and identify your key words. Copy the next slide onto your spiral index card. You do not need to draw the illustrations. iPAWS i P A W S I will PAWS! Point Out Key Words by underlining the words and circling the question. Analyze and Arrange the Information Take out the important information. Work it Out What mathematical operations do you need to use? How many steps do you need to take to solve this problem? Solve It- Does it make sense? Your teacher will read over the next two index cards, then allow you to copy. You have five minutes. You have 5 minutes to copy the notes. Craig’s mother works at a soda company just 5 miles from their house. She said that every 8 minutes, a machine fills 150 bottles. How many minutes does it take to fill 675 bottles? P= Our key word is every, and our question is How many minutes does it take to fill 675 bottles? A= 8 minutes per 150 bottles and ? Minutes per 675 bottles. We need to set up a ratio to solve this problem. We are comparing two quantities. Is the 5 miles important in this word problem? You have 5 minutes to copy the notes. W= We need to set up the problem like this: 8 minutes . _X_minutes (We put X here since we don’t know the total minutes) 150 bottles 675 bottles S= Solve it Let’s cross multiply 8 X 675 = 5400 150 x X= 150x How do we get X by itself? X = 36 minutes Let’s Go! ✔For Understanding You have 5 minutes. •Using iPAWS, complete the 2 word problems on the worksheet. Exit Ticket • You will have 12 minutes to complete 10 problems. • Go to Quia and Find the Quiz entitled Exit Ticket_February 25_2011