三位数两部混合运算823-556+226 800-712+365 716-321+485 747-658-687= = = = = = =870-680+568 814-705-548 823+556+782 800+712+145= = = = = = =716+321-563 747+658+449 870+680+154 814+705 -456= = = = = = =354-267+290 388+152118 409355+223 433+396187= = = = = = =437+295+475 384+26427= 236+150312 494296+456= = = = = = =491+349122 50055+339 289+512522 144223+148= = = = = = =475152+490 141+181382 208206+357 318+104942= = = = = = =22942+453 394+190145 317314+215 348+282457 = = = = = = =27213+459 340252+257 203178+135 490123+31= = = = = = =245184+78 315130+272 471328+254 392+55230= = = = = = =417300+10 0 531138+166 269212+329 415+41396= = = = = = =229+17975 466+26645 231202+247 16648+295= = = = = = =46549+222 438+376137 130145+162 397149+118= = = = = = =433+105295=465166+272=319206+481=463311+174=241110+497=284+158207=368226+162=287+206382=404+327209=17316+274=271+204424=361338+499=249207+348=272+213408=255+215114=341246+444=153+14776=293+113182=24196+343=392+30881=479103+33=398190+232=87+5925=281268+109=377+375200=375+45318=21619+201=494402+349=369139+179=47461+323=9354+39=481+272248=190110+198=