secrets-of-mental-math-malestrom

More documents

Recommendations

Info

264 Answers 5. 89,854 2 854 2 854 (90 89 1) 90 854 76,860 1 854 854 “Stone” 76,006 2,000 152,012,000 152,012,000 89,000 2 7,921,012,000 8,073,012,000 854 2 729,316 8,073,741,316 46 46 900 808 727,200 (900 808) 2,116 (46 2 ) 729,316 6. 76,934 2 934 2 871,200 (968 900) 934 (930 4) 76 930 76 70,680 4 76 304 “Pie Chief” 76,984 2,000 141,968,000 141,968,000 76,000 2 5,776,000,000 5,917,968,000 934 2 872,356 5,918,840,356 34 34 968 900 1,156 (34 2 ) 872,356
3-by-3 Multiplication (page 192) 1. 644 (640 4) or 286 640 286 183,040 (8 8 10) 4 200 800 183,840 4 86 344 184,184 Answers 265 644 (7 92) 286 684 286 286 7 92 2,002 92 184,184 2. 596 (600 4) 3. 853 167 325 (320 5) 600 167 100,200 320 853 272,960 4 167 668 5 800 4,000 99,532 276,960 5 53 265 277,225 4. 343 (7 7 7) 226 343 226 226 7 7 7 1,582 7 7 11,074 7 77,518 5. 809 (800 9) 527 800 527 421,600 9 527 4,743 426,343 6. 942 (42) 879 (21) 900 921 828,900 21 42 882 828,018
Page 2 and 3:
This book has been optimized for vi
Page 5 and 6:
SECRE+S OF MEN+AL MA+H The Mathemag
Page 7:
I dedicate this book to my wife, De
Page 11 and 12:
Contents Foreword by Bill Nye (the
Page 13 and 14:
Foreword by Bill Nye (the Science G
Page 15 and 16:
Foreword xiii Well, actually, I hop
Page 17:
Foreword xv there are also an infin
Page 20 and 21:
xviii Foreword math nut. Immunizati
Page 22 and 23:
xx Prologue in on his secrets of
Page 24 and 25:
xxii Prologue where he learned thes
Page 26 and 27:
xxiv Introduction Too often, math i
Page 28 and 29:
2 Secrets of Mental Math 35 2 What
Page 30 and 31:
4 Secrets of Mental Math Absolutely
Page 32 and 33:
6 Secrets of Mental Math Similarly,
Page 34 and 35:
8 Secrets of Mental Math Although I
Page 36 and 37:
10 Secrets of Mental Math Exception
Page 38 and 39:
12 Secrets of Mental Math math in y
Page 40 and 41:
14 Secrets of Mental Math 67 28 8
Page 42 and 43:
16 Secrets of Mental Math 858 7 re
Page 44 and 45:
18 Secrets of Mental Math lot easie
Page 46 and 47:
20 Secrets of Mental Math Carl Frie
Page 48 and 49:
22 Secrets of Mental Math Of course
Page 50 and 51:
24 Secrets of Mental Math 958 417
Page 52 and 53:
26 Secrets of Mental Math to 10. We
Page 54 and 55:
28 Secrets of Mental Math By roundi
Page 56 and 57:
30 Secrets of Mental Math mentally,
Page 58 and 59:
Page 60 and 61:
34 Secrets of Mental Math problems
Page 62 and 63:
36 Secrets of Mental Math 3-BY-1 MU
Page 64 and 65:
38 Secrets of Mental Math sometimes
Page 66 and 67:
40 Secrets of Mental Math 376 (300
Page 68 and 69:
Page 70 and 71:
44 Secrets of Mental Math BE THERE
Page 72 and 73:
46 Secrets of Mental Math 41 2 1 42
Page 74 and 75:
48 Secrets of Mental Math other squ
Page 76 and 77:
50 Secrets of Mental Math WHY THESE
Page 78 and 79:
52 Secrets of Mental Math Similarly
Page 80 and 81:
54 Secrets of Mental Math Gardner o
Page 82 and 83:
56 Secrets of Mental Math same digi
Page 84 and 85:
New and Improved Products: Intermed
Page 86 and 87:
60 Secrets of Mental Math 59 (60 1
Page 88 and 89:
62 Secrets of Mental Math 88 (90 2
Page 90 and 91:
64 Secrets of Mental Math To see ho
Page 92 and 93:
66 Secrets of Mental Math Remember
Page 94 and 95:
68 Secrets of Mental Math 67: 67 3
Page 96 and 97:
70 Secrets of Mental Math EXERCISE:
Page 98 and 99:
72 Secrets of Mental Math Rounding
Page 100 and 101:
74 Secrets of Mental Math 2. The ea
Page 102 and 103:
76 Secrets of Mental Math 13 1,000
Page 104 and 105:
78 Secrets of Mental Math Chapter 8
Page 106 and 107:
Chapter 4 Divide and Conquer: Menta
Page 108 and 109:
82 Secrets of Mental Math Let’s t
Page 110 and 111:
Page 112 and 113:
86 Secrets of Mental Math In using
Page 114 and 115:
88 Secrets of Mental Math 682 23 I
Page 116 and 117:
Page 118 and 119:
92 Secrets of Mental Math original
Page 120 and 121:
94 Secrets of Mental Math way is to
Page 122 and 123:
96 Secrets of Mental Math 6 7 8 .
Page 124 and 125:
98 Secrets of Mental Math You can e
Page 126 and 127:
100 Secrets of Mental Math A number
Page 128 and 129:
102 Secrets of Mental Math Divisibi
Page 130 and 131:
104 Secrets of Mental Math It is al
Page 132 and 133:
106 Secrets of Mental Math So, To a
Page 134 and 135:
Chapter 5 Good Enough: The Art of
Page 136 and 137:
110 Secrets of Mental Math Notice t
Page 138 and 139:
112 Secrets of Mental Math 8,367 5
Page 140 and 141:
114 Secrets of Mental Math onds doe
Page 142 and 143:
116 Secrets of Mental Math We obser
Page 144 and 145:
118 Secrets of Mental Math Divide:
Page 146 and 147:
120 Secrets of Mental Math roots. I
Page 148 and 149:
122 Secrets of Mental Math MORE TIP
Page 150 and 151:
124 Secrets of Mental Math I will s
Page 152 and 153:
126 Secrets of Mental Math number o
Page 154 and 155:
128 Secrets of Mental Math and sinc
Page 156 and 157:
130 Secrets of Mental Math EXERCISE
Page 158 and 159:
132 Secrets of Mental Math COLUMNS
Page 160 and 161:
134 Secrets of Mental Math As illus
Page 162 and 163:
136 Secrets of Mental Math 4. 3 5 8
Page 164 and 165:
138 Secrets of Mental Math Next, we
Page 166 and 167:
140 Secrets of Mental Math You have
Page 168 and 169:
Page 170 and 171:
144 Secrets of Mental Math Step 4.
Page 172 and 173:
146 Secrets of Mental Math Shakunta
Page 174 and 175:
148 Secrets of Mental Math Here’s
Page 176 and 177:
150 Secrets of Mental Math EXERCISE
Page 178 and 179:
152 Secrets of Mental Math work by
Page 180 and 181:
154 Secrets of Mental Math words: m
Page 182 and 183:
156 Secrets of Mental Math 93: bum,
Page 184 and 185:
158 Secrets of Mental Math And: 69
Page 186 and 187:
Page 188 and 189:
162 Secrets of Mental Math 362 beco
Page 190 and 191:
164 Secrets of Mental Math learned
Page 192 and 193:
166 Secrets of Mental Math Once you
Page 194 and 195:
168 Secrets of Mental Math Thomas F
Page 196 and 197:
170 Secrets of Mental Math numbers
Page 198 and 199:
172 Secrets of Mental Math Then do
Page 200 and 201:
Page 202 and 203:
Page 204 and 205:
178 Secrets of Mental Math Using th
Page 206 and 207:
180 Secrets of Mental Math Adding 8
Page 208 and 209:
182 Secrets of Mental Math If both
Page 210 and 211:
184 Secrets of Mental Math I diagra
Page 212 and 213:
186 Secrets of Mental Math In our n
Page 214 and 215:
188 Secrets of Mental Math produces
Page 216 and 217:
190 Secrets of Mental Math be conve
Page 218 and 219:
192 Secrets of Mental Math (e.g., 4
Page 220 and 221:
194 Secrets of Mental Math As with
Page 222 and 223:
196 Secrets of Mental Math I should
Page 224 and 225:
198 Secrets of Mental Math Since yo
Page 226 and 227:
200 Secrets of Mental Math 3. divid
Page 228 and 229:
202 Secrets of Mental Math Hence, a
Page 230 and 231:
204 Secrets of Mental Math 2 on lin
Page 232 and 233:
Page 234 and 235:
208 Secrets of Mental Math The quot
Page 236 and 237:
210 Secrets of Mental Math ask the
Page 238 and 239:
212 Secrets of Mental Math the squa
Page 240 and 241: 214 Secrets of Mental Math Why This
Page 242 and 243: 216 Secrets of Mental Math rest of
Page 244 and 245: 218 Secrets of Mental Math Year Cod
Page 246 and 247: 220 Secrets of Mental Math For date
Page 248 and 249: Chapter ∞ Epilogue: How Math Help
Page 250 and 251: 224 Secrets of Mental Math There is
Page 252 and 253: 226 Secrets of Mental Math seniors,
Page 254 and 255: 228 Secrets of Mental Math investig
Page 256 and 257: 230 Secrets of Mental Math 7. Is th
Page 259 and 260: Answers CHAPTER 1: A LITTLE GIVE AN
Page 261 and 262: Answers 235 Three-Digit Subtraction
Page 263 and 264: 13. 757 14. 259 15. 297 297 16. or
Page 265 and 266: Answers 239 2 100 5. 98 2 9600 2 2
Page 267 and 268: Answers 241 2-by-2 Addition-Method
Page 269 and 270: 2-by-2 Factoring-Method Multiplicat
Page 271 and 272: Answers 245 13. 38 63 (9 7) 15.
Page 273 and 274: Answers 247 234 17 3. 217 2 46,800
Page 275 and 276: Answers 249 CHAPTER 4: DIVIDE AND C
Page 277 and 278: Answers 251 23. 4,425,575 No: 4 4
Page 279 and 280: Answers 253 7. 7 8 1 1 4 1
Page 281 and 282: Answers 255 9. 104,972 10. 5,462,74
Page 283 and 284: Square Root Guesstimation (page 150
Page 285 and 286: 3-by-2 Exercises Using Factoring, A
Page 287 and 288: 21. 281 or 281 (280 1) 44 (11 4
Page 289: Answers 263 3. 58,324 2 “Liver”
Page 293 and 294: Answers 267 13. 783 (87 9) 589 1
Page 295 and 296: Answers 269 5-by-5 Multiplication (
Page 297 and 298: Bibliography RAPID CALCULATION Cutl
Page 299 and 300: Index addition: an “amazing” su
Page 301 and 302: Index 275 factoring a number: in th
Page 303 and 304: Index 277 three-by-two problems, 16
Page 305: About the Authors DR. ARTHUR BENJAM
show all

secrets-of-mental-math-malestrom

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?