49×98用简便方法计算201×56-56用简便方法计算
第1个回答 2017-04-13
49×98用简便方法计算
=49×100-49×2
=4900-98
=4802
201×56-56用简便方法计算
=56×(201-1)
=56×200
=11200本回答被提问者和网友采纳
=49×100-49×2
=4900-98
=4802
201×56-56用简便方法计算
=56×(201-1)
=56×200
=11200本回答被提问者和网友采纳
第2个回答 2017-04-13
49×98
=49×(100-2)
=4900-98
=4900-100+2
=4800+2
=4802
201×56-56
=(201-1)×56
=200×56
=11200
第3个回答 2017-04-13
49×98=49×(100-2)
=49×100-49×2
=4900-98
=4802
201×56-56
=(201-1)×56
=200×56
=11200
=49×100-49×2
=4900-98
=4802
201×56-56
=(201-1)×56
=200×56
=11200
