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20以内加减法竖式计算240题姓名:_ 日期:_ 得分:_ 用时:_427137224344321105482622563151814431914537210281415311172911114110163717344811011021122133310142412101115316913124457325613352612711124523151111617233102623221042261323212252198235821845261232101367181545161102273428231228111364292333151341103192179116442922
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