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二年级数学下册五《加与减》买电器一课三练北师大版.doc

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1第一节 买电器1我会填。(1)500400( )想：( )个百加( )个百是( )个百，就是( )(2)1500300( )想：( )个百减( )个百是( )个百，就是( )1 算一算。知识点 2整百整十数加减整百数的口算方法2 送小鸟回家。升级跷跷扳4在里填上“” “ 5. 170 700 280 5206(1)400550950(米)答：小军家到小华家有 950米。(2)550400150(米)答：小华家到学校比小军家到学校远 150米。7. 3003

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