REAL-LIFE MATH

1 ByEleanor AngelesREAL-LIFEMATHReal- life Math Scholastic Teaching ResourcesPhoto credits:Illustration credits:Cover design by Sol sInterior design by Sol sScholastic grants teachers permission to photocopy the reproducible pages for classroom use. No other part of this publication may be reproduced in whole or in part, or stored in a retrievalsystem, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without written permission of the publisher. For information regarding permission, write to Permission Dept., Scholastic Inc., 557 Broadway, New York, NY 10012 ISBN: 0-439-23777-7 Copyright 2002 REAL-LIFE Math Scholastic Teaching ResourcesREAL-LIFEMATHI ntroduction.

2 5 Before You Begin .. 6 Section 1: Just the Facts.. 71. Addition .. 82. Subtraction.. 113. Multiplication .. 134. Division .. 165. Estimating .. 196. How to Use a Pocket Calculator .. 217. Skills Survey .. 23 Section 2: Your Daily Math.. 241. Money Tracker .. 252. (Unit Price x Quantity) + Sales Tax .. 263. Paying for a Meal .. 274. How to Save on Transportation.. 295. At the Grocery .. 306. In the Post Office .. 317. Putting It All Together .. 328. Skills Survey .. 33 Section 3: Your Money and Math.. 341. Checking Account .. 352. Balancing Your Checkbook.. 373. Savings .. 394. Budgeting.. 415. Renting an Apartment.

3 436. Are You Covered?.. 457. All About Credit .. 468. Filing Your Income Tax .. 489. Putting It All Together .. 5010. Skills Survey.. 52 Section 4: Math Goes to Work.. 531. The Best Paying Job .. 542. Working Time .. 553. Time-and-a-Half .. 564. Earning by the Piece or by Commission 585. What Is Profit? Loss? .. 596. Pricing .. 617. Bookkeeping .. 628. Putting It All Together .. 639. Skills Survey .. 65 Section 5: Math Savers.. 661. City and Highway Mileage .. 672. Gas Saving Habits .. 693. Do It Yourself .. 704. Using the Calculator s Memory .. 715. Discounts .. 736. Buy More, Pay Less .. 747. Putting It All Together.

4 758. Skills Survey .. 76 Section 6: Math Where You Least Expect It 771. Where Does Your Team Stand? .. 782. Going Places .. 793. Temperature Change .. 814. The Metric System .. 835. Shopping With Foreign Money .. 856. Putting It All Together .. 877. Skills Survey .. 88 Glossary.. 89 Answer Key .. 91 CONTENTSReal- life Math Scholastic Teaching ResourcesReal- life Math Scholastic Teaching Resources4 IntroductionWHO NEEDS SCHOLASTIC REAL-LIFE MATH?You no matter what you do in life , math is REAL-LIFE Mathgives you practice using math for everyday get and keep a job, you need math run a home or a workshop, you need math sports, travel, shopping you use math every , whether you need math at the grocery store or on a vacation, each section will improve your necessary math lessons have a Quick Reference Box.

5 This is the information you willneed to do the you need help with any of the calculations, just turn to page 89. Here, in theGlossary, you will find the meanings of any unfamiliar words. Remember tokeep a pad of paper by you at all times: You will need it for calculations!The Skills Surveypages at the end of each section can be used to test yourprogress. REAL-LIFE Math Scholastic Teaching Resources50 0 0 Before You BeginHere is some basic information you will need to know before going any further. Place ValuesThe value of 5 in each of the places shown onthe chart is different. Each place has ten timesthe value of the next place to the right.

6 A 5 in thehundreds place has a value of 5 x 100, or 500. A5 in the hundredths place has a value of 5 x1100,or5100. Another way to represent5100is . MillionsTen MillionsMillionsHundred ThousandsTen ThousandsThousandsHundredsTensOnesTenths HundredthsThousandths5, 5 5 5, 5 5 5, 5 5 5 . 5 5 5 PLACE VALUESB illionsHundred MillionsTen MillionsMillionsHundred ThousandsTen ThousandsThousandsHundredsTensOnesTenths HundredthsThousandths1 3, 1 3 4, 9 2 0 PLACE VALUESW rite the following numerals in the Place Values Chartat right. The first one is done for million, one hundred thirty-four thousand, nine hundred twentySeventy eight and two tenthsSix hundred fifty-five thousand, two hundred seventeenTwo hundred thirty-fourOne billion, five hundred six million, and one hundred twenty-five thousandEight thousand two hundred twenty-one and five hundredthsAnswer the following What is the value of 2 in the hundreds place?

7 2. What is the value of 2 in the hundredths place?3. 3/10 is another way to represent 3 in the An 8 in the thousands place has a value of .5..008 means that the 8 is in the Math Scholastic Teaching Resources61 Contents1. Addition .. 82. Subtraction .. 113. Multiplication .. 134. Division .. 165. Estimating .. 196. How to Use a Pocket Calculator .. 21 Skills Survey .. 23section Just the FactsYou are a mathematician. When you re buyinggroceries, countingchange,or scoringa ballgame, you are using mathskills. The exercises in Section 1 will help you prepare for the REAL-LIFE problems you will face later on in this Math Scholastic Teaching Resources71.

8 ADDITIONA ddition and Subtraction TableUse the directions above to find the answers to the following problems. Write the letterof the problem next to each answer in the 13 6B. 8 + 7C. 14 9We use addition to find out the totalwhen we combine two or more 8 9 101112131415161788910111213141516171899 1011121314151617181910101112131415161718 1920 Use this table to add and subtract. To add two numerals, find one in bold in the toprow, and the other in bold in the left-hand column. To find your answer, follow theircorresponding row and column until they meet. To subtract, work backward using the same Math Scholastic Teaching Resources8 Next, add the 125b.

9 617b. 2234522433211325 Then add the 125c. 617c. 2234522433211327 Write the 5. 6. Complete the table what you ve +0+1+2+4+5+7+8+90124578 911111111+0+1+2+3+6+7+8+9123478910222222 22+0+3+4+5+6+7+8+9256789101133333333 +1 +2+4+5+6+7+8+9457891011124444444 +0+1+2+3+4+6+8456781012555555 5+0+1+3+5+7+8+95681012131466 66666+0 +2+4+5+6+7+868101112131477 777 77+1+2+3+5+6+7+989101213141688 88888+0 +2+4+5+6+8+9810 121314161799999999 +0 +1+3+4+5+7+8+9910121314161718 Addition: Working Right to LeftWhen you add numbers with many digits, begin with the column on the right, the add the 125a.

10 617a. 2234522433211323 REAL-LIFE Math Scholastic Teaching Resources9 Line up these addends and find the 235 + 4 + 61 + 4000 = + 34 + 5 + 789 =Adding Long ColumnsYou can add long columns of numbers in different ways. Hereare some suggestions to solve the following the ones 5 + 8 + 4 + 2 = 19 Add the tens 50 + 50 + 30 + 10 = 140 Add the hundreds 400 + 600 + 800 + 200 = 2000 Then, add the ones, tens, and hundreds +2000+2122159Or, try this the first two numbers: 455 + 658 = the next two numbers: 834 + 212 = 1046 Then, add your two answers together to find the final sum (2159).Find the sums using the method that s easiest for + 456+ 618+ 953109+ 63 Checking SumsOne way to check your answer in addition is to change the orderof the addends, or numbers you re adding.