如题所述
第1个回答 2017-05-13
217X101-27
=217x(100+1)-27
=21700+217-27
=21700+200-10
=21900-10
=21890
=217x(100+1)-27
=21700+217-27
=21700+200-10
=21900-10
=21890
第2个回答 2017-05-13
217X101-217
=217x(101-1)
=217x100
=21700本回答被网友采纳
=217x(101-1)
=217x100
=21700本回答被网友采纳