129×99简便方法
第1个回答 2017-10-19
129×99简便方法
=129×(100-1)
=129×100-129
=12900-129
=12771
=129×(100-1)
=129×100-129
=12900-129
=12771
第2个回答 2017-10-19
129X99
=129X(100-1)
=129X100-129X1
=12900-129
=12771本回答被网友采纳
=129X(100-1)
=129X100-129X1
=12900-129
=12771本回答被网友采纳
第3个回答 2017-10-19
=129X(100-1)
=129X100-129×1
=12900-129
=12771
=129X100-129×1
=12900-129
=12771