89X25X24简便方法计算下面各题89X25X24简便方法计算下面各题
第1个回答 2017-03-23
89X25X24简便方法
=89x25x4x6
=(89x6)x(25x4)
=534x100
=53400
=89x25x4x6
=(89x6)x(25x4)
=534x100
=53400
第2个回答 2017-03-23
89X25X24
=89X(25X4X6)
=(90-1)x(100x6)
=90x600-1x600
=54000-600
=53400
=89X(25X4X6)
=(90-1)x(100x6)
=90x600-1x600
=54000-600
=53400
第3个回答 2017-03-23
89x25x24
=(90-1)x25x4x6
=(90-1)x600
=90x600-600
=54000-600
=53400
=(90-1)x25x4x6
=(90-1)x600
=90x600-600
=54000-600
=53400
第4个回答 2017-03-23
=25×4×6=100×6=600