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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,2019/10/17,#,2,两位数加两位数(进位加),一、回顾,抢答,8+7=,15,7+6=,13,9+5=,14,27+30=,57,35+40=,75,20+43=,63,2,一、回顾,49,26,75,49+1=50,50+25=75,4 9,+ 2 6,7 5,9+6=15,40+20=60,60+15=75,3,二、探究,2,3,+1,4,=,7,48,+,29,=,7,34,+,41,=,5,2,7,+1,8,=,5,第一招:,快速写出,个位,4,二、探究,34,+,23,=,5,34,+,28,=,6,45,+,34,=,7,36,+1,7,=,5,第二招:,快速写出,十位,9,3,5,二、探究,46,38,27,45,2,7,4,8,边算边写,6,三、应用,限时计算,7,三、应用,边算边写,26+38=,54+27=,36+25=,56+17=,32+47=,63+29=,43+27=,48+16=,53+25=,4,6,1,8,1,6,3,7,9,7,2,9,0,7,4,6,8,7,8,三、应用,6,+ 2,8 4,6,+ 2,9 4,1,1,4,4,9,三、应用,6,+ 2,8 4,0,1,2,3,4,0,4,1,3,2,2,3,1,4,0,4,做一做,5,6,7,8,9,10,三、应用,6,+ 2,9 4,5,6,7,8,9,5,9,6,8,7,7,8,6,9,5,1,4,1,做一做,0,1,2,3,4,11,三、应用,3,+,86,试一试,12,三、应用,3,+,86,试一试,3,+,86,5,4,6,16,13,四、能力提升,闯一闯,+,94,=(),=(),2,7,+,=(),4,2,2,2,14,四、能力提升,闯一闯,+,94,=(),=(),7,1,+,=(),14,7,7,7,1,15,+,6,=(),=(),9,四、能力提升,16,The end,谢谢大家!,17,三、能力提升,闯一闯,+,6,=(),=(),9,0,9,0,9,0,18,三、能力提升,闯一闯,+,6,=(),=(),9,1,0,1,0,1,19,三、能力提升,闯一闯,+,6,=(),=(),9,3,2,3,2,3,2,20,三、能力提升,闯一闯,+,6,=(),=(),9,7,21,
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