72脳98鐢ㄧ畝渚胯繍绠楁槸澶氬皯鑴卞紡
第1个回答 2017-02-08
72x98
=72X(100一2)
=72X100一72X2
=7200-144
=7056追答
=72X(100一2)
=72X100一72X2
=7200-144
=7056追答
87X101
=87X(100+1)
=87X100十87X1
=8700十87
=8787
第2个回答 2017-02-08
72*98
=72*(100-2)
=7200-144
=72*(100-2)
=7200-144