二年级数学下册五《加与减》回收废电池课堂作业北师大版.doc

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1第二节 回收废电池1用竖式计算。138204356217104248312229答案:342 573 352 5412森林小医生。3你能帮小狗找到骨头吗?答案:610 722 735 837 957 999*4小红和小明跳绳比赛,小红跳了 126 下,小明跳了 147 下,他们两个人一共跳了多少下?答案:126147273(个)答:他们两个人一共跳了 273 个。2

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