CONTENTS ACKNOWLEDGMENTS INTRODUCTION xi xiii INTRODUCTORY DECIMAL LESSONS ONE Representing Decimals with Base Ten Blocks TWO Introducing Decimal Notation THREE Decimal Riddles FOUR Comparing Decimals 1 9 21 27 EXTENDING DECIMALS FIVE Decimal Nim SIX The Lobster Problem SEVEN Constant Calculating EIGHT The Sum and Difference Game 36 42 49 56 INTRODUCTORY PERCENT LESSONS NINE TEN Introducing Percents Percent Designs 62 76 CONNECTING FRACTIONS AND DECIMALS ELEVEN Benchmarks TWELVE Relating Fractions and Decimals THIRTEEN Introducing Repeating Decimals Teaching Arithmetic: Lessons for Decimals and Percents, Grades 5–6 © 2002 Math Solutions Publicationis 83 94 103 vii LINKING MONEY AND DECIMALS FOURTEEN The Eight-Coin Problem FIFTEEN Money Riddles SIXTEEN Foreign Exchange and Rounding SEVENTEEN Pigs Will Be Pigs EIGHTEEN Alexander, Who Used to Be Rich Last Sunday NINETEEN $1.00 Word Riddles ADDITIONAL ACTIVITIES 161 Broken Calculator 161 162 163 164 165 166 167 Getting to One Target Practice Knockout From Here to There Cover Up Pursuit of Zero ASSESSMENTS Which Is Larger? Where Does the Decimal Point Belong? Closest to 0, .5, or 1? Putting Decimals in Order Putting Decimals and Fractions in Order Which Answer Makes Sense? Selling Plants What Do You Know About Decimals? What Do You Know About Percents? BLACKLINE MASTERS Place Value Mat Donna’s Decimals Decimal Riddles The Greatest Wins Decimal Nim Target Race to Zero Target II Sam and Sally The Sum and Difference Game viii 110 119 128 134 146 152 Contents Teaching Arithmetic: Lessons for Decimals and Percents, Grades 5–6 © 2002 Math Solutions Publicationis 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 Place Value Spinner Directions 10-by-10 Grids Percent Designs Percent Grids T Design Large 10-by-10 Grid $1.00 Bills $5.00 Bills $10.00 Bills Money Riddles More Money Riddles Enchanted Enchilada Menu Values of Letters Cover Up Pursuit of Zero INDEX Teaching Arithmetic: Lessons for Decimals and Percents, Grades 5–6 © 2002 Math Solutions Publicationis 205 Contents ix