( ? )×18 = 正确的乘积,此算式看成 (?)的18倍是多少
( ? )×15 = 错误的乘积,此算式看成 (?)的15倍是多少
错误的乘积比正确的乘积少了609,即少了(?)的3倍
则另一个因数(?)=609÷(18-15)=203
正确的乘积 203×18=3654
小明在做一道数学乘法时把18错看成15 结果积少了609,正确的积是多少
小明在做一道数学乘法时把18错看成15 结果积少了609,正确的积是多少
数学人气:629 ℃时间:2019-11-02 01:13:41
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