三年级数学下册三《乘法》找规律基础习题(无答案)北师大版.doc

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1找规律基础习题一、判断1.在乘法中,如果两个乘数都扩大到原来的 10 倍,积也要扩大到原来的 10 倍。 ( )2.5040 的积的末尾有两个 0。 ( )二、选择1.1520130( )A.160B.170C.1802.(28+32)30( )A.18B.180C.18003. 40(35+21)( )A.224B.2240C.224004. 4040395( )A.1205B.125C.52

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