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二年级数学下册五《加与减》6算得对吗课件1北师大版.ppt

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绿色圃中小学教育网http:/,小结： 1、加法用减法来验算 2、用和减任何一个加数等于另一个加数,小结： 1、减法用加法来验算 2、用差加减数等于被减数,计算并验算。,367+254=,732 186=,验算,验算,1.,2.,601,348,3,6,3,705,406,3,0,1,486,317,7,9,3,5,2,9,9,2,1,0,1,8,如果错，说说怎样改正？,

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