精品文档三位数加三位数的加法175 + 157 = 645 + 239 = 808 + 213 =256+775 =607 + 914 =352 + 708 =766+792 =970+ 602 =343 + 801 =916+861 =806+ 487 =691 + 400 =106+537 =353 + 939 =328 + 114=356 + 319 = 34 + 199 = 844+932=199+398= 801+60= 814+551= 75+505= 481+2仁665+300= 729+808= 306+812= 28+91仁 263+206= 644+64=537+385= 310+534=861+146= 558+32仁 502+957= 857+423=459+86= 473+577= 733+530= 139+312= 323+29仁 387+833=964+103=686+936= 921+23仁 302+355= 195+676= 968+825=519+171=216+612= 160+248= 515+449= 118+377= 865+868=797+338=716+316= 983+327= 825+332= 548+430= 783+460=898+584=830+54= 979+605= 897+727= 750+253= 659+567=577+545=641+353= 940+456= 979+488= 680+502= 637+63仁911+75= 876+648= 599+481= 834+776= 569+366= 975+883=。