这个题用巧算是: 146789X356568=146789X(400000-43432)=146789X400000-146789X43432=146789X400000-(146789X40000+146789X3000+146789X400+146789X30+146789X2)=146789X400000-146789X40000-146789X3000-146789X400-146789X30-146789X2=14678900000X4-1467890000X4-14678900X4-146789/2X2X2-146789000X3-1467890X3=(14678900000-1467890000-14678900-73394.5)X4-(146789000+1467890)X3=13196257705.5X4-148256890X3=52785030822-444770670=52340260152