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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,*,小学数学一年级上册,9,加几(凑十法),亚东第一小学:丁宝生,1,、组成:,9,1,8,1,7,1,6,1,5,1,8,7,6,5,4,2,、口算:,1+8= 1+7=,1+6= 1+5=,9,8,7,6,1,、组成:,4,1,3,1,2,1,3,2,1,2,、口算:,1+3= 1+2=,1+1=,4,3,2,9,2=,想:,9,加( )得,10,。,1,复习,9,2=,想:,9,加( )得,10,。,1,1,1,10,1,11,11,10,加( )得( )。,9,3=,想:,9,加( )得,10,。,1,复习,9,3=,想:,9,加( )得,10,。,1,1,2,10,2,12,12,10,加( )得( )。,小结:看大数、分小数、,凑成十,算 得数。,凑十法,9,4=,想:,9,加( )得,10,。,1,复习,9,4=,想:,9,加( )得,10,。,1,1,3,10,3,13,13,10,加( )得( )。,9,5=,想:,9,加( )得,10,。,1,复习,9,5=,想:,9,加( )得,10,。,1,1,4,10,4,14,14,10,加( )得( )。,小结:看大数、分小数、,凑成十,算 得数。,9,6 =,想:,9,加( )得,10,。,1,复习,9,6=,想:,9,加( )得,10,。,1,复习,9,6=,想:,9,加( )得,10,。,1,1,5,10,5,15,15,10,加( )得( )。,9,7 =,想:,9,加( )得,10,。,1,复习,9,7=,想:,9,加( )得,10,。,1,复习,9,7=,想:,9,加( )得,10,。,1,1,6,10,6,16,16,10,加(,)得( )。,9,8=,想:,9,加( )得,10,。,1,1,7,10,7,17,17,10,加(,)得( )。,想一想,9,9=,想:,9,加( )得,10,。,1,1,8,10,8,18,18,10,加(,)得( )。,想一想,2,、,9+1= 9+2= 9+3=,9+4= 9+5= 9+6=,9+7= 9+8= 9+9=,10,11,12,13,14,15,16,17,18,
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