如题所述
第1个回答 2016-11-14
299×99
=(300-1)×(100-1)
=300×100-1×100-300×1+1×1
=30000-100-300+1
=30000-400+1
=29600+1
=29601
=(300-1)×(100-1)
=300×100-1×100-300×1+1×1
=30000-100-300+1
=30000-400+1
=29600+1
=29601
第2个回答 2016-11-14
299x99
=299x100-299
=29900-300+1
=29601本回答被提问者采纳
=299x100-299
=29900-300+1
=29601本回答被提问者采纳