400—1561/7144+582=299+398=801-69473+377233+53944+632=199+398=801-98=814-551=75+505=481-21=665-112=929-808=306+112=28+911=299+206=644+64=537-385=310+534=801-146=500-321=502+159=857-429=459+86=139+312=323+291=387-289=三位数加减法计算题练习一2/7814+551=75+505=481+21=665+1000=729+808306+812=28+911=263+206=644+64=537+385=310+534=861+146=558+321=502+957=857+423=459+86=473+577=733+530=139+312=323+291=387+833=964+103=44+932=199+398=801+60=814+551=75+505=481+21=3/7665+1000=729+808=306+812=28+911=263+206=644+64=537-385=310+534=861-146=558-321=502+957=857-423=459-86=473+577=733-530=139+312=323-291=387+833=964+103=940-456=979-488=680-502=637-631=911-75=599-481=834-776=569-366=975-883=三位数加减法计算题练习四4/7622+190=437+270=683+181=903-786=三位数加减法计算题练习一5/738+241=277+566=630-341=929-611=935-690三位数加减法计算题练习四6/7476+451380+475=540+448=683-604=138+81=469+412=225+675=433-21=321+416=298+600=718+174=995-775=985-807=136+471=345+427=437+270=683+181=903-786=81+519=789+256=597+396=821-468=443-286=450+540=771-297=626+976=1000-63=