应用加法交换律和结合律简便计算练习.docx

1、应用加法交换律和结合律简便计算练习6+ (157+ 94) =499 + 16 + 284 + 101 = 120+ (229 + 80) =265 + 435 + 91 + 9=374 + 62 + 38 + 26 = 135+ (683 + 65) = 318+ (229 + 382) = 260 + (322 + 40) =184 + 216 + 103 + 97 =46+ 254+ + 161 =127 + 73 + 259 + 141 =221 + 479 + 46 + 54 =82+ (167 + 18) =102 + 42 + 498 + 58 =98+ 33 + 167 + 1

2、02 =388 + 12 + 188 + 312 =312 + 288 + 82 + 118 =361 + (221 + 239) =594 + 108 + 92 + 106 =218+ (638 + 82) =22 + 152 + 248 + 78 =405 + (473 + 95) =410 + 389 + 11 + 90 =69 + 69 + 231 + 31 =175 + 354 + 25 + 346 =129 + 71 +118 + 282 =83+ 100 + 200 + 17 =76 + (423 + 24) =364 + 35 + 65 + 236 =82 + (410 + 1

3、8) =97 + (21 + 3)=92 + 53 + 47 + 108 =95 + (610 + 5)=113 + (105 + 87) =8 + (326 + 392) =483 + 117 + 178+ 22 =165 + (327 + 135)=308 + 165 + 35 + 292 =487 + 295 + 5+ 13 =164 + 153 + 36 + 447 =352 + 248 + 43 + 257 =307 + 150 + 50 + 93 =92 + (555 + 108) =307 + (168 + 393)=113 + 60 + 387 + 40 =84+ 386 +1

4、4 + 216 =199+ 174 + 1 + 526 = 619+ (144 + 81) = 72 + 146 + 554 + 128 = 90 + 168 + 332 + 110 = 347 + (403 + 153) = 84 + (899 + 16) = 450 + 150 + 196 + 104 = 121 + 371 + 29 + 379 = 171 + 11 + 89 + 429 = 169 + 51 + 431 + 49 = 531 + (140 + 169) = 78 + 100 + 500 + 122 = 23+ 205 + 395 + 277 = 228 + 172 +

5、148 + 252 = 190+ 10 + 634 + 66 = 66 + 65 + 35 + 234 = 518 + 92 + 8+ 182 = 28+ 572 + 49 + 151 = 244 + (482 + 56) = 98 + 402 + 58 + 142 = 131 + (739 + 69) = 33 + (515 + 267) = 96 + 4+ 241 + 59 = 473 + 114 + 27 + 286 = 8+ 692 + 79 + 21 =49 + (619 + 251) =584 + (204 + 16) =10 + 390 + 337 + 63 =63 + (347

6、 + 337) =348 + (59 + 252) =68 + 148 + 452 + 132 =91 + (560 + 109) =229 + 438 + 71 + 62 =149 + (132 + 551)=220 + (312 + )=337 + 50 + 50 + 263 =45 + 316 + 284 + 55 =5+ 15 + 185 + 395 =59 + 84 + 716 + 41 =365 + 35 +172 + 228 =122+ 105 + 78 + 395 =591 + 82 + 218 + 9 =118 + 198 + 282 + 2 =14 + (104 + 86)

7、 =464 + 36 + 236 + 164 =237 + 363 + 169+ 31 =12 + 88 + 400 + 100 =546 + (313 + 54) =463 + 72 + 128 + 237 =30 + (451 + 70) =515 + 85 + 37 + 263 =310+ (237 + 290) =154 + 53 + 47 + 46 =154 + 53 + 47 + 46 =109 + 60 + 391 + 140 =106 + 594 + 133 + 67 =200 + 26 + 74 + 400 =101+ 63 + 599 + 137 =135 + 32 + 6

8、8 + 465 =41 + (326 + 59) =106+ (59 + 494) =5+ 95 + 244 + 56 =7+ (150+ 93) =162 + (465 + 38) =266 + 27 + 134 + 73 =178 + 84 + 416 + 222 =104 + 54 + 146 + 596 =323 + 156 + 277 + 44 =67 + 233 + 10 + 90 =374 + 115 + 185 + 126 =80 + 20+ 370 + 230 =174 + 375 + 26 + 25 =32 + 168 + 172 + 28 =232 + (342 + 36

9、8)=49+ 399 +101 + 151 = 575 + 183 + 17 + 125 = 683 + 162 + 17 + 38 = 37 + (243 + 563) =47+ 122 + 278 + 453 = 161 + 264 + 39 + 136 = 69 + 231 + 256 + 44 = 13 + 202 + 98 + 287 = 505 + 84 +195 + 116 = 15 + 90 + 385 + 10 = 75 + 525 + 67 + 33 = 75 + (295 + 325) = 100 + 300 + 172+ 28 = 272 + 428 + 37 + 16

10、3 = 145 + (104 + 455)= 149 + (358 + 151)= 222 + (+178) = 275 + (231 + 125)= 208 + 27 + 92 + 73 = 178 + (733 + 22) = 2 + 261 + 498 + 39 = 59 + 148 +152 + 41 =50+ (251 + 50) = 378 + 59 + 41 + 222 =107+ (491 + 293) = 387 + 113 + 145 + 55 = 35 + 366 + 65 + 134 = 6+ (210+ 94) = 87 + 13+ 7 + 793 = 428 + 1

11、72 + 190 + 110 = 75 + 93 + 425 + 307 = 204 + 26 + 74 + 496 = 11 + 393 + 107 + 289 = 241 + 59 + 370 + 30 = 20+ 269 + 131 + 380 = 77 + (504 + 323) = 20+ (119 + 80) =162 + 338 + 208 + 192 =50 + (156 + 350) = 161 + (151 + 39) = 554 + 256 + 44 + 46 = 566 + 174 + 34 + 26 = 40 + 26 + 74 + 160 = 99 + 105 +

12、401 + 295 = 128 + 87 + 113 + 472 = 61 + 564 + 236 + 39 = 146+ (71 + 54) =222 + 249 + 251 + 178 = 3+ 29+ 71 + 297 =79 + (603 + 21) =59 + 41 + 37 + 63 =156+ (459 + 44) =106 + (651 + 94) =596 + (78 + 104) =113 + 387 + 22 + 278 =84 + (751 + 116) =191 + (746 + 9)=202 + 363 + 198+ 137 =179 + 21 +157 + 43

13、=410 + 18 + 290 + 182 =202 + (172 + 498)=318 + 15 + 82 + 85 =55+ 293 +107 + 245 =356 + 99 + 44 + 101 =359 + 20 + 80 + 341 =458 + (294 + 142)=93 + (488 + 207) =167 + 29 + 371 + 133 =353 + 66 + 47 + 34 =361 + 108 + 39 + 92 =30 + 96 + 470 + 104 =23 + 590 +110 + 177 =56+ (294 + 544) =125+ (708 + 75) = 5

14、0 + 275 + 425 + 150 = 165+ (33 + 535) = 133+ 167 + 62 = 204 + 39 + 396 + 61 = 392 + 135 + 108 + 65 = 292 + 63 + 137 + 208 = 70 + (155 + 130) = 28+ (478 + 172) = 200 + 200 + 421 + 79 = 64 + 32 + 68 + 36 = 26 + 74 + 220 + 80 = 264 + 336 + 34 + 66 = 131+ 295 + 5+ 269 = 124+ (481 + 176) = 88 + 212 + 67

15、+ 33 = 376 + (389 + 24) = 154 + 390 + 346 + 10 = 83 + 429 + 17 + 371 = 15+ 687 + 85 + 113 = 61 + 239 + 112 + 88 = 347 + 74 + 26 + 153 = 233 + 9+ 191 + 367 = 462 + (172 + 238) = 104 + 207 + 96 + 493 =382 + 218 + 241 + 59 =418 + 80 + 20 + 82 =103 + 14 + 86 + 297 =125 + (407 + 75) =48+ (395 + 52) =412 + (259 + 88) =99+ 225 +1 + 475 =392 + 63 +108 + 37 =454 + (136 + 246)=283 + 387 + 113+ 117 =377 + 223 + 76 + 24 =123+ 577 + 16 + 84 =412 + 117 + 83 + 188 =488 + (330 + 12) =226 + (226 + 174)=296 + 39 +104 + 161 =244 +