9的减法文档.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,*,9,的减法,1,9,8,=,-1,2,8,-1=,9,3,9,8,=,-1,4,9-1=,8,5,-8=,1,9,6,-8=,1,9,7,-8=,1,9,8,9,-8,=,1,9,9-,8,=,1,8,9-,1,=,总结,10,9,=,7,-2,11,9,=,7,-2,12,9,=,7,-2,13,看图列算式。,-2,=,7,9,14,9-2=,7,15,9-2=,7,16,9,=,2,-7,17,9,=,2,-7,18,9,=,2,-7,19,9,=,2,-7,20,9,=,2,-7,21,9,-,7=,2,9,-,2=,7,22,9,=,6,-3,23,9,=,6,-3,24,9,=,6,-3,25,9,=,6,-3,26,9,=,6,-3,27,9,=,6,-3,28,9,=,3,-6,29,9,=,3,-6,30,9,=,3,-6,31,9,=,3,-6,32,9,=,3,-6,33,9,=,4,-5,34,9,=,4,-5,35,9,=,4,-5,36,9,4,=,-5,37,9-5=,4,38,9-5=,4,39,9,=,5,-4,40,9,=,5,-4,41,-4,=,5,9,42,9,=,5,-4,43,9,=,5,-4,44,9,=,5,-4,45,9,=,5,-4,46,算一算。,9-1=,9-8=,9-2=9-7=,9-3=9-6=,9-4=9-5=,7,2,8,1,6,3,5,4,47,