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三年级数学下册三《乘法》队列表演（二）拔高练习（无答案）北师大版.doc

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1队列表演（二） 1.明明在做两位数乘两位数的计算题时，把第一个数乘数 23 看成了 32，结果比正确的积多了 99。正确的积是多少？2.小虎在计算一道题时，把一个数乘 3 加 20，误看成一个数除以 3 减 20，得数是 72。这个数是多少？正确的得数是多少？

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