格子乘法(课堂PPT).ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,1,格,子,乘,法,2,格,子,乘,法,3,格,乘,子,法,15,世纪意大利的一本,算术书中介绍 一种,格子乘法,那么你能照下面的例子算出,“357x46”,的积吗？,4,4,6,7,5,2,8,4,2,2,3,0,0,3,4,5,0,4675,3450,5,4,6,7,5,2,8,4,2,2,3,0,0,3,4,5,0,4675,3450,6,4,6,7,5,2,8,4,2,2,3,0,0,3,4,5,0,4675,3450,7,8,9,10,4,6,7,5,2,8,4,2,2,3,0,0,3,4,5,0,4675,3450,11,4,6,7,5,2,8,4,2,2,3,0,0,3,4,5,0,4675,3450,12,4,6,7,5,2,8,4,2,2,3,0,0,3,4,5,0,4675,3450,13,