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二年级数学下册五《加与减》小蝌蚪的成长同步练习2北师大版.doc

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1小蝌蚪的成长 一、帮它们好吗？ 学生先四人小组讨论、估算，说说为什么？ 独立算验证，汇报时说算理。二、算一算，填一填。副食店运来 410 千克鸡蛋，上午卖出 152 千克，下午卖出 174 千克，还剩多少千克？三、填入正确的答案，（1）14589( )。A56 66 C234 D144（2）345=233+（ ）A122 B111 C112 D102（3）345+211=（ ）A556 B555 C566 D5762参考答案：一、帮它们好吗？二、算一算，填一填。410-152=258258-174=84三、入正确的答案，（1）A（2）C（3）A3

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