應(yīng)用加法交換律和結(jié)合律簡(jiǎn)便計(jì)算練習(xí)x

1、13 + + 687+62 =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 + 102 =388 + 12 + 188 + 312

2、 =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 =109 + 591+82 + 118 =48 + + 52 + 214 =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 + 18) =97 + (21

3、+ 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 + 14 + 216 =154+46 + 562 + 38 =199 + 1

4、74 + 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 + 148+252 =190 +10 + 634 + 66 =66 + 65 + 35+234 =51

5、8+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 =187 + 13 + 154+46 =49 + (619 + 251) =584 + (204 + 16) =10 + 390 + 337 + 63 =63 + (347 + 337) =348 + (59 + 252) =68 + 148+452 + 132 =91+(560 +

6、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) =464 + 36 + 236 +164 =237 + 363 + 169 + 31 =12 + 88+400 + 100 =546 + (

7、313+54) =122 + 378 + 181 + 19 =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 + 68+465 =41+(326 + 59) =106 + (59+494) =5+95+244 + 56 =7 + (150 + 93) =162 + (465+3

8、8) =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 + 368) =49 + 399 + 101 + 151 =575 + 183 + 17 + 125 =683 + 162 + 17 + 38 =37 + (243+563) =47 + 122

9、+ 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 + 163 =145 + (104+455) =149 + (358 + 151) =222 + (+178) =275 + (231 + 125) =208 + 27+92+73 =178 + (733 + 22) =2 + 261+498 + 39

10、 =59 + 148 + 152+41 =50 + (251+50) =378 + 59+41+222 =107 + (491+293) =387 + 1 13 + 145+55 = 35+366 + 65 + 134 =6 + (210 + 94) =87 + 13+7+793 =428 + 172 + 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

11、+ 338 + 208 + 192 =50 + (156 + 350) = 161+(151+39) =554 + 256+44+46 =566 + 174 + 34 + 26 =40 + 26 + 74 + 160 =99 + 105+401+295 =128 + 87 + 113+472 = 61+564 + 236 + 39 =146 + (71+54) =222 + 249 + 251 + 178 =3+29+71+297 =23+(61+ 477) =79 + (603+21) =59+41+37 + 63 =156 + (459+44) =106 + (651+94) =596 +

12、 (78 + 104) =113 + 387+22 + 278 =84 + (751 + 116) =191+(746 + 9) =202 + 363 + 198 + 137 =179 + 21 + 157+43 =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 =36

13、1 + 108 + 39 + 92 =30 + 96+470 + 104 =23+590 + 110 + 177 =56 + (294 + 544) =125 + (708 + 75) =50 + 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

14、 =264 + 336 + 34 + 66 = 131+295+5+269 =124 + (481 + 176) =88 + 212 + 67 + 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 =217 + 145 + 155+283 =382 + 218+241+59 =418 +

15、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 + 1 17 + 83 + 188 =488 + (330+12) =226 + (226+174) =296 + 39 + 104 + 161 =244+72 + 128+256

16、=10 + 78+90 + 322 =93+7+46 + 554 =288 + 105+412 + 95 =135 + 165+65+535 =97 + (445 + 103) =20 + 280 + + 161 =113 + 187 + 175+225 =151+27 + 349 + 73 =433 + (275+267) =168+232 + 289 + 11 =50 + 50 + 655+45 =182 + (793 + 18) =254 + (292 + 146) =25+93 + 107+275 =498 + 102 + 187 + 113 =435 + (178 + 65) =27

17、 + (525 + 173) =581 + 156 + 119+44 =35+297+565+3 =307 + (2 + 93) =307 + (203 + 193) =221+79 + 310 + 290 =210 + (93+490) =302 + (13+298) =132 + 68 + 166 + 534 =285 + (604+15) =437+23+77+63 =163+29 + 71+337 =73 + 105+95 + 127 =679 + (45+21) =50+46 + 254 + 550 =5 + 36 + 295+264 =315+(365 + 85) =141+24

18、+ 359 + 276 = 308 + 168 + 392 + 32 =99 + 289 + 11+301 =18+(68+ 382) =129+71 + 109 + 291 =57 + 123+643+77 =218 + 103 + 197 + 82 =20 + 680 + 88 + 12 =108+99 + 592 + 101 =86 + 315 + 14 + 185 =23+477 + 58+42 =389 + (527 + 11) = 176+424 + 148+52 =256 + (37+244) =158 + (306 + 342) =211+2 + 98+489 = 93+298

19、+2+407 =174 + (273+426) =357+78 + 122 + 143 =71+29 + 310 + 290 =127 + (85+373) =278 + 322 + 88+212 = 41+55+245+259 = 152+48+436 + 164 =225 + (372 + 275) =303 + (59 + 197) =215 + (153+485) =344 + 69 + 131+56 =435 + (225+65) =291 + 17 + 83+409 =499 + 165+35 + 1 =214 + 228 + + 72 =610 + 11+89 + 90 =39

20、+ 269 + 131+61 =185 + (465+215) =40 + 283 + 17 + 160 =32 + 159 + 68 + 141 =129 + 271+29 + 371 =275+20 + 80 + 325 =215+(352 + 285) =58 + (23+442) =269 + 31 + 148+52 =143 + (172 + 557) = 283+33 + 117 + 367 =26 + (122+474) =387+(93+213)=243 + 120+457 + 80 =114 + (463+286) =421+62 + 38+279 =506 + 68 + 3

21、2 + 194 = 25+475+337 + 63 =99 + 375 + 125+301 =153 + 185+215 + 147 =19 + 29 + 371 + 181 =85 + 15 + 178+22 =405 + 165+35+95 =198 + (51+502) = 161+539+43 + 157 =568 + 38+62 + 132 =224 + 9 + 191+76 =16 + 389 + 11+84 =30 + 70 + 562 + 38 = 299+42 + 201+358 =67 + (714 + 33) =152+48 + 244+156 = 53+462 + 24

22、7 + =2 + (840+ 98) =25 + 8+92+475 = 73+327+445+55 =157 + (78+543) =21 + 179+40 + 560 =124 + (299 + 376) = 401+(207 + 299) = 158+42 + 52 + 148 =271+29 + 16+484 =204 + 250 + 50 + 96 =3 + (795+97) =450 + ( + 250) =28+72 + 238+262 =396 + 60+4 + 140 =79 + 21 + 124 + 176 =27 + 273+445+55 =52 + (236 + 348)

23、 =78 + 285 + 122 + 315 =163 + 141+59 + 37 =607 + (67 + 93) =50 + 275+425 + 150 =496 + (212 + 104) =162 + + + 114 =26 + 153+74 + 547 =19 + (695 + 81) =54 + (873+46) =55+45 + 31 + 169 =133+67 + 106 + 94 =367 + (107 + 133) =89 + 549 + 251 + 11 =194 + (659 + 6) =91+9 + 283+517 =11+31+269 + 189 =350+45+3

24、50 + 55 =204 + 15+96 + 185 =109 + (523 + 191) =371+207 + 229 + 93 =301 + 199 + 64 + 236 =268 + (96 + 332) =198+2 + 22 + 278 =75+(423+25) =172 + 28+286 + 314 = 253+247+91 + 109 =277 + (369 + 223) =133 + 362 + 338+67 = 111+459 + 289+41 =102 + 144 + 56 + 398 =76 + 568 + 32 + 124 =19 + (194 + 181) =598

25、+ 102+43+57 =410 + (382 + 90) =578 + (62 + 122) =542 + 158 + 172 + 28 =293 + (314 + 307) =148 + 18 + 182 + 152 =43+(55+ 457) =252 + 148 + 166 + 334 =213 + 111+387 + 89 =388 + 108 + 92 + 212 =393 + (494+107) =88 + 165+612 + 35 =389 + 261 + 111+39 =142 + (164 + 58) =16 + (411+84) =372 + 162 + 28 + =12

26、 + 51+88 + 149 =19 + (231+681) =530 + (125+70) =133+267 + 250 + 150 = 271 + 153 + 129 + 347 = 203+71+29 + 197 = 378+322 + 97 + 103 =20 + (644 + 80) =363 + 171+329 + 37 = 526+74 + 16 + 184 =102 + (99 + 398) =534 + 66 + 70 + 30 =187 + 198 + 2 + 513 =99 + 644 + 56 +1 =185 + 387 + 315 + 13 =259 + (456 +

27、 141) =294+72 + 106 + 28 =600+45 + 100 + 55 =184 + 63 + 137 + 516 =133 + 160 + 140 + 267 =447 + (493 + 53) =372 + 28 + 199 + 1 =81+285+515 + 19 =336 + 192 + 8 + 364 =165 + (476 + 335) =676 + 24 + 94 + 6 =100 + 114 + 100 + 386 =280 + (331+220) =44+42 + 56 + 358 =178 + (129+422) =18+63+682 + 37 =255 +

28、 (101+345) =165 + (528 + 35) =191+(302 + 309) =314 + 150 + 50 + 386 =98+202 + 25+75 =74 + 17 + 683+26 =163 + 187 + 113+337 =63+72 + 237 + 28 =105 + 17 + 83 + 195 =136 + 64 + 265+435 =162 + 1 17 + 83+438 =53+459+47 + 241 =315 + (425 + 85) = 501+99 + 70 + 30 =17 + 183+301+399 =13 + 179 + 521+87 = 53+4

29、38+47 + 162 =357 + 195+243+5 =618 + (185 + 82) =254 + 90 + 346 + 10 =80 + (248+20) = 507+93+79 + 21 =26 + (774 + 174) =99 + (239 + 201) =55+(788+45) =470 + 144 + 56 + 30 =59+495+5 + 141 =238 + 30 + 170 + 362 =385 + 15 + 16 + 84 =137 + 363 + 148+52 = 222+478 + 112 + 88 = 43+3+57 + 297 =115+93 + 185+7

30、 =198 + 159+41+402 =241 + 100 + 500 + 59 = 374+40 + 260 + 26 = 48+74 + 26 + 552 =390 + 69+431 + 10 =15+291+385 + 109 =438 + 168 + 32 + 162 =380 + (60 + 320) =20 + 80 + 7 + 293 =31 +354 + 69+46 =27 + 132 + 273+68 =322 + (507 + 78) =110+72 + 90+428 =483+67 + 233 + 117 =230+74 + 326 + 170 =4 + 96+46+45

31、4 =228 + 12+472 + 88 =518 + (154 + 82) =30 + 270 + 262 + 38 =175 + 88 + 212+425 =153 + (27 + 147) =491+35+65+209 =12 + (665+88) =35+96 + 365+4 =46 + 204 + 154+496 =221+79 + 547 + 53 =413+48 + 87+52 =422 + 17 + 83+278 =142 + (485+58) =22 + 78 + 238+62 =74 + (188 + 126) =243+51 + 157 + 249 =90 + 95+5+

32、410 =10 + 290+451+49 =167 + 33+289 + 311 =74 + 18+426 + 82 =324 + 35+65+276 =444 + 30 + 156 + 170 =257+43+496+4 =28+72 + 583 + 17 =123 + (447 + 177) =456 + 8+92 + 144 =5+70 + 230 + 95 =634 + 66 + 76 + 24 =696 + (115+4) =338 + 38+62 + 62 =190 + 110 + 334 + 66 =110 + 360 + 190+40 =39 + (803+61) =54 +

33、246+439 + 61 =214 + (101+86) =80 + 21+420 + 379 =183 + 317 + 145+255 =133+67 + 136 + 64 =315+89 + 11+285 =580 + 20 + 22+78 =184 + 95+5+216 =125 + 159 + 375+41 =159+429+71+41 =145 + 189 + 11+455 =499 + (68+201) =258+60 + 140+42 =307 + (9+ 393) =32 + 538+62 + 68 =150 + (454 + 50) =79+450 + 50 + 21 =62

34、5 + (223+75) =166 + 81+419 + 34 =496 + 292 + 8 + 104 =389 + (301 + 111) =397 + 38+62 + 203 =275 + 141+59 + 325 =49 + 51+301+399 =287 + (233 + 313) =259+41+67 + 33 =55+45+229 + 271 =173 + (289+527)=53 + 84 + 147 + 616 =476 + 3 + 124 + 197 =+ 214 + 67 + 333 =438 + 162 + 130+70 =319 + 381+25+75 =107 +

35、(28 + 393) =265 + 30 + 35+370 =177+9 + 123+291 =556 + (2+44) =181+(391+319) =9 + + 14 + 391 =396 + 350 + 50+4 =11+41+659 + 89 =25+(324 + 275) =62 + 38 + 121+79 =284 + 16+46 + 254 =104 + (450 + 396) =49 + 51+319 + 381 =194 + 5+95+6 =557+63 + 143+37 =86 + (784 + 14) =356 + 189 + 11+344 =118+93 + 82 +

36、607 =37 + 563 + 181 + 19 =315 + (211+385) =605 + (263+95) =89 + 249 + 111+351 =98 + (159 + 2) = 361+339+76 + 24 =16 + 84 + 61+539 =463+92 + 8 + 137 =100 + 114 + 100 + 386 =368 + (1+ 332) = 167+233+61+39 = 211+327 + 173 + 89 =367 + (421+33) =565 + 135 + 136 + 64 =271+226+74 + 329 =56+44 + 259 + 141 =

37、250 + 36 + 150 + 264 =286 + 142 + 158 + 314 =188 + (457 + 112) =293 + 107 + 88 + 12 =438 + 38+62 + 162 =372 + 50 + 50 + 328 =57 + 214 + 86 + 543 =91+209 + 244 + 156 =542 + 12 + 158 + 88 =100 + (513 + 200) =64 + 36 + 37+63 =63 + 37 + 364 + 36 =27 + (441+73) =37 + (21+63) =196 + (601 + 104) =331+(411+

38、69) =501+(198+99)=54+477+46 + 23 =358 + 142+46 + 254 = 14+486 + 76 + 324 = 31+(145+69) = 245+55+487 + 13 =292 + (103+208) =281 + 159 + 219+41 =298+72 + 202 + 28 =425 + 190 + 110 + 175 =303+48 + 152 + 297 =51+82 + 218+249 =261+50 + 50 + =695+42 + 5+58 =29 + 342 + 71 + 158 =69 +136+464 + 31 =122 + (32

39、5+478) =176 + (479 + 124) =184 + (310+116) =347 + (258 + 53) =274 + 62 + 38 + 326 =359 + 241 + 160+40 =49 + 51 + 172 + 528 =495 + (299 + 205) =89 + (580 + 11) =365 + (303 + 35) =130 + 99 + 101+570 =479 + 144 + 121+56 =297+75+203 + 125 =237 + (358 + 163) =145 + 155+283 + 117 =5 + 188 + 212 + 95 =329

40、+ 129 + 371+71 =28 + 30 + 170 + 572 =65+255+35+445 =292 + (20 + 208) =388 + 237 + 112 + 163 =37 + 63 + 133+67 =73 + (115+627) =163 + 123+37+77 =37 + 263+478 + 22 =427 + 173 + 16 + 184 =62 + (7+) =72 + 28 + 268+432 =116 + 56+44 + 584 =154 + (146+46) =236 + 123 + 164 + 177 =67 + 32 + 668 + 33 =6 + 678

41、+94 + 22 =67 + 33+550 + 150 =97 + (172+403) =58 + 642 + 7 + 193 =270 + (623 + 30) =57 + (461+243) =114+42 + +58 =510 + (275 + 190) =162 + 162 + 38+538 =200 + (118+400) =315 + 36 + 285+64 =51+411+49 + 189 =169 + 252+431+48 =71+299+401+29 =172 + 363 + 128 + 137 =249 + 237 + 351+63 =250 + 50+163+437 =5

42、26 + (273 + 174) =194 + 5+95+406 =107 + (348 + 93) =67 + 51 + 133 + 149 =98 + (876 + 2) =47+433 + 167 + 153 =37 + 306 + 63+294 =517 + 39 + 183 + 161 =282 + 18 + 100 + 200 =217 + (217 + 83) =17 + 683 + 133+67 =115 + 8+92 + 85 =170 + (86 + 230) =461 + 168 + 32 + 39 =206 + 94 + 109 + 91 =266 + (266 + 3

43、4) =95 + (543+305) =117 + (237+483) =433 + (149 + 267) =3 + (397+ 97) =35+92 + 8 + 165 =210 + (422 + 290) =181+62 + 38+419 =178 + (758 + 22) =452 + (176+148) =8+57+92 + 243 =5 + 183+495+217 =133 + 39 + 67+461 =287 + 192 + 308 + 13 =12 + 258+242 + 188 =131+(177 + 569) =106 + 94 + 154 + 246 =610 + 90

44、+ 100 + 100 =62 + 38 + + 61 =7 + (521+93) =68 + 267 + 332 + 133 =84+129 + 16 + 571 =168+213 + 32 + 287 =176 + (37 + 124) =122 + 278 + 25+375 = 51+81+249 + 319 =71 + 129 + 37+263 = 65+35 + 184 + 16 =+ (244 + 114) =94 + 6+457 + 143 =38 + 177 + 162+423 =130 + (302+470) = 31+4 + 296 + 369 =324 + (426 +

45、176) =237 + 144 + 263+56 =188 + 165+212 + 35 =356 + (394+44) =40+150 + 350 + 360 =298 + 362 + 38+202 =167 + 33 + 167 + 333 =179 + 268 + 32 + 121 =62 + 38 + 184 + 516 =382 + 291 + 118+9 =208 + 192 + 103 + 197 二159 + 63+341+37 = 249+72+451+28 =189 + (634+11) =151 + 149 + 34 + 66 = 475+225+70+130 =176

46、+ 324 + 265+35 =55+45+628+72 =4+492 + 8 + 96 =196 + 189+4 + 111 =358 + 330+42 + 70 =374 + 226 + 187 + 13 =260 + (170 + 340) =32 + (612 + 268) =41 + 159 + 157 + 143 =62 + 338+64 + 36 =25+475 + 85+315 =11+2+98 + 689 =490+77 + 23+210 =98 + (341+502) =364 + 69 + 336 + 131 =189 + 50 + 50 + 111 =76 + (176

47、+424) =172 + 66 + 528 + 34 =210 + 8+92 + 190 =416 + 270 + 184 + 30 = 518+93 + 82+7 =122 + 345+78 + 155 = 26 + (206+474) = 303+297 + 88 + 12 = +164 + 536 + 61 = 449 + 151+25+75 = 82 + 75+418 + 125 = 301+99 + 259+41 = 147+92 + 8+53 = 137+63 + 157 + 343 = 480 + 252 + 120+48 = 61+239 + 301 + 199 = 688 +

48、 12 + 64 + 136 = 296 + (152 + 304) = 133+24 + 367+76 = 94 + 6 + 256 + 344 = 284 + 133 + 167 + 316 = 93+45+7 + 255 = 359 + 23+77 + 341 = 188+(473 + 112) = 611+54 + 89 + 146 = 92 + 30 + 608 + 170 = 223 + 129 + 77 + 271 =444 + (307 + 56) =79 + 27+621+73 =378+225 + 122+75 =197+6+403+294 =241 + 123+77 +

49、59 =174 + 12+488 + 126 =218 + (203+482) =43+357 + 118 + 282 =190+410 + 193 + 107 =137 + (250 + 563) =92 + (336 + 308) =505+(217+95) =183 + 141 + 17 + 59 =89 + (314+111) =211 + 126 + 389+74 =294+45+6 + 55 =72 + (203 + 128) =12 + 88 + 184 + 216 =235+45+455 + 165 =12 + 199 + 101+588 =40 + 93+260+7 =240

50、 + 53+347 + 160 =268 + + 32 + 20 =438 + 19 + 281 + 162 =594 + (83 + 106) =670 + 30 + 145+55 =19 + (658 + 81) = 492+41+59 + 8 = 170 + (86 + 230) = 198 + 143 + 257 + 102 = 479 + 39 + 221 + 161 = 278 + 1 13+287 + 22 = 187 + (122 + 13) = 92 + 77 + 23+308 = 157 + (147 + 243) = 568+29 + 71 + 132 = 70 + (4

51、34 + 130) = 452+48+238 + 62 = 34+466 + 22 + 178 = 475 + 83 + 17 + 225 = 172 + 128 + 349 + 51 = 372 + 28+268 + 32 = 83+(424 + 17) = 286+(435+214) =10 + 385+215+90 =6 + (785 + 194) =2 + 9 + 98+91 =79 + 214 + 386 + 121 = 63+204 + 337 + 296 = 364 + 69 + 136 + 231 = 451+(51 + 149) = 94 + 30 + 106 + 370 =

52、 252 + (601+48) = 466 + 234 + 22 + 178 = 27+73 + 100+700 =16 + 54+184 + 346 = 107 + (59 + 593) = 318 + (347 + 282) = 45+207 + 355+293 = 116+44 + 56+484 = 238 + (466 + 262) = 46 + 108+54 + 192 = 344 + 56 + 22+478 = 28 + 190 + 110 + 272 = 212 + 88 + 34+466 = 438 + (137 + 162) = 443 + (148 + 57) = 80 +

53、 568 + 32 + 220 = 557+(105 + 143) = 54 + (110 + 546) = 221+27 + 379 + 273 = 101+99+487 + 213 = 332 + 60 + 168+40 = 554 + (336+46) = 424 + 276 + 13 + 87 =113 + 187 + 13+387 =174 + (205 + 126) =60 + (575 + 140) =158 + (365+42) =55+244 + 356 + 245 =86 + 14 + 28+272 =125+(212 + 75) =655 + 32 + 68+45 =18

54、9 + 195+305 + 11 =420 + 150 + + 150 =69 + (359 + 531) =111+(177 + 289) =370 + (70 + 330) =123+(525+77) =466 + 332 + 68 + 34 =30 + 70 + 391+409 =+ 220 + 91 + 109 =39 + 153+47 + 161 =203 + 12+497 + 88 =70 + 230 + 16 + 184 =+ 135 + 162 + 165 =256 + 51+344+49 = 198+202 + 175 + 125 =110 + (666 + 90) =124

55、 + (577 + 76) =58 + 36+442 + 64 =502 + 89 + 11 + 198 =174 + 202 + 98+26 = 115+408+92 + 185 =154 + 183 + 146 + 17 =283 + (408 + 17) =617+6 + 83+94 =58 + (584 + 242) =74 + (579 + 326) =351+(357 + 249) =256 + 36 +144+464 =160 + 368 + 332+40 =17 + (349 + 183) =63+204 + 337 + 296 =541+(108 + 59) =35+465 + 136 + 164 =152 + (62 + 348) =528 + 1