9加几教学课件（吴晓燕自制）

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,*,“有效的计算课”探究,塘墀中心小学一（2）班,执教者：吴晓燕,9加几,10,+,3,=,1,3,10,+,7,=,1,7,10,+,9,=,1,9,10,+,2,=,1,2,10,+,6,=,1,6,10,+,5,=,1,5,5,+,10,=,1,5,1,+,10,=,1,1,4,+,10,=,1,4,8,+,10,=,1,8,复习准备：看一看，想一想！,你们真棒,！,探究新知：,9个,一共有多少个 呢？,(,个,),9,+,4,？,10,，,11,，,12,，,13,。,9 + 4,=,13,接数法,9 + 4 =,1,3,10,13,凑十法,9 +,7 =,1,6,10,1,6,10,1,5,15,1,4,10,14,观察小结：我们是怎样计算9加几的？,顺口溜：,9加几，,分小数,；,凑成十,，算得数。,9 +,4 =,10,9 +,7 =,10,1,3,1,3,1,6,1,6,凑十法,9 +,3 =,12,10,2,9 +,8 =,17,10,7,9 +,2,=,1,1,10,1,9 + 9 =,18,10,8,对比观察：看看有什么规律？,9+2=,11,9+3=,12,9+4=,13,9+5=,14,9+6=,15,9+7=,16,9+8=,17,9+9=,18,9+,2,=,1,1,9+,3,=,1,2,9+,4,=,1,3,9+,5,=,1,4,9+,6,=,1,5,9+,7,=,1,6,9+,8,=,1,7,9+,9,=,1,8,9,+2=,11,9,+3=,12,9,+4=,13,9,+5=,14,9,+6=,15,9,+7=,16,9,+8=,17,9,+9=,18,9+,5,=,1,4,多,1,少,1,加数,个位,9+7=1,9+5=1,9+,8,=1,6,4,7,想一想，填一填：,9 + =1,6,5,4,3,9+5=,9+2=,9+4=,9+6=,9+0=,9+1=,9+8=,9+3=,9+7=,9+ 9=,9+10=,14,11,13,15,9,10,17,12,16,18,19,你们真棒,！,碰碰车,9+2=,碰碰车,9+5=,9+3=,9+6=,9+8=,学生作业：,比一比,看谁做得又对又快!,再见！,