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,*,九的乘法口诀,池水九年制学校 李慧,赛龙舟的总共有多少人？,1,个,9,0,9,18,2,个,9,3,个,9,4,个,9,5,个,9,6,个,9,7,个,9,8,个,9,9,个,9,袋鼠蹦,1,9,9,2,9,18,3,9,27,4,9,36,5,9,45,6,9,54,7,9,63,8,9,72,9,9,81,9,1,9,9,2,18,9,3,27,9,4,36,9,5,45,9,6,54,9,7,63,9,8,72,一九得九,二九十八,三九二十七,四九三十六,五九四十五,六九五十四,七九六十三,八九七十二,九九八十一,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,一九得九,二九十八,三九二十七,2,X9=6,X9=7X9=9X9=,9X8=9X3=9X5=9X4=,18,54,63,81,72,27,45,36,6,X9=9,X4=8X9=,5X9+9=9X3+9=9X9-9=,7X9-9=,9X5-9,=7X9+9=,你发现了什么？,54,54,54,36,36,36,72,72,72,X,=,72,谢谢,