1三位数加减法计算题练习844+932=199+398=801+60=814+551=75+505=481+21=665+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=686+936=921+231=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=637-631=911-75=876-648=599-481=834-776=569-366=975-883=2345脱式计算6844+932-226=199+398+456=801+60-78=814+551-450=75+505-320=481+21-420=665+1000-133=729+80-233=306+812-562=28+911-78=263+206+352=644+64+123=537+385-230=310+534-368=797-338-274=716-316-274=983-327+368=825-332+368=548-430+368=783-460+368=898-584+123=830-54+368=979-605-274=897-727+123=750-253+368=659-567-274=57