三年级数学下册三《乘法》队列表演(二)综合练习(无答案)北师大版.doc

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1队列表演(二) 1.用竖式计算。7311= 2312= 1331=2.判断。(1)一个数乘 1 等于它本身,一个数乘 0 也等于它本身。 ( )(2)两位数乘两位数,积一定是三位数。 ( )(3)7420=1480。 ( )3.选择。(1)最小的两位数乘最大的一位数的积是( ) 。A19B90C9(2)下列算式中,计算正确的是( ) 。A. 6420=1280B. 6240=2460 C. 5230=2740(3)0+7+8+9 与 0789 的得数相比, ( ) 。A一样大B乘法算式的得数大C加法算式的得数大4.植树。2

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