468-132+132-68用簡便算灋怎麼算

468-132+132-68用簡便算灋怎麼算


(468-68)+(132-132)=400



136*46+132*32+132簡便計算


136*46+132*32+132
=132*46+4*46+132*32+132
=132*79+4*46
=132*80-132+184
=10560-132+184
=10612