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,*,十几减九,义务教育课程标准实验教科书(人教版第二册),原来有,12,个风车,卖掉了,9,个。,还剩几个风车?,9+()=12,12 9=,3,3,12 -9 =,3,2,10,1,有,15,个气球,卖了,9,个。,还剩几个气球?,1.,读一读,算一算。,1,1,-,9=,1,2,-,9=,1,3,-,9=,1,4,-,9=,1,5,-,9=,1,6,-,9=,1,7,-,9=,1,8,-,9=,2,4,3,6,5,8,7,9,1,2,3,4,5,6,7,8,看谁填得,多!,谢谢,