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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,*,两位数加、减一位数,6,9,62,8,65,4,7,8,27,2,32,6,15,54,61,15,25,38,复 习,例,1,:,我借了,6,本连环画。,还剩,42,本连环画。,原来有多少本连环画?,2,6,8,40,8,48,一个接着一个的数,,43,、,44,、,45,、,46,、,47,、,48,。,还可以怎样算?,42,6,( )本,48,42,2,2,2,48,练一练:,1.,想一想,算一算。,23,3,5,23,26,28,例,2,:,小兔拔了,49,个萝卜,运走了一车。,运走了多少个萝卜?,49,6,43,(个),还剩,6,个。,说一说你是怎么算的?,9,6,3,40,3,43,练一练:,一箱牛奶,喝了一个星期之后,还剩,3,袋,喝了多少袋?,24,3,21,(袋),例,3,:,现在有多少本书?,69,4,( )本,73,说说你是怎样算的?,还回来,4,本书。,10,根捆成,1,捆。,把,69,看成,70,。,70,4,74,74,1,73,69,1,70,70,3,73,9,4,13,60,13,73,练一练:,填空。,(,1,),35,加,3,的和里面有( )个十。,(,2,),35,加,7,的和里面有( )个十。,3,4,例,4,:,连环画有多少本书?,书柜里有,9,本字典。,57,9,( )本,48,57,10,47,47,1,48,10,9,1,47,1,48,17,9,8,40,8,48,7,根减,9,根不够减,打开一捆再减。,练一练:,11,3,15,8,21,3,35,8,61,3,65,8,91,3,95,8,8,88,58,18,7,27,57,87,48,79,59,给小鸟找家,47,28,71+8,44+3,6+42,25+3,53+6,开火车口算:,30,40,40,50,20,60,25,2,83,5,33,6,34,5,25,1,42,7,70,49,90,80,27,88,39,39,26,52,3,55,43,20,72,6,23,4,33,3,54,20,63,78,74,27,36,找新家:,总结,两位数减一位数,个位上的数减个位。,两位数减整十数,十位减十位。,也就是说,相同数位相减。,谢谢大家!,
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