两、三位数的加法和减法思维导图总结(3页)Good is good, but better carries it.精益求精，善益求善。两、三位数的加法和减法两、三位数的加法和减法....................................................................................................11.口算..................................................................................................................................21.1.口算两位数加、减两位数：先拆数（拆成几十和几），再口算（先加（减）几十再加（减）几）............................................................................................22.运算..................................................................................................................................22.1.列竖式计算加减法..................................................................................................22.1.1.加法...................................................................................................................22.1.2.减法...................................................................................................................23.验算.................................................................................................................................23.1.加法验算..................................................................................................................23.1.1.把两个加数调换位置再算一次.....................................................................23.2.减法验算..................................................................................................................33.2.1.用差+减数，看看是否等于被减数..............................................................34.犯的错误.........................................................................................................................34.1.读题错误..................................................................................................................34.2.抄错题.....................................................................
