简便计算(1+1/2+1/4)*(1/2+1/4+1/6)-(1+1/2+1/4+1/6)*(1?
(1+1/2+1/4)*(1/2+1/4+1/6)-(1+1/2+1/4+1/6)*(1/2+1/4)简便计算求过程思路跪谢答主爸爸...
(1+1/2+1/4)*(1/2+1/4+1/6)-(1+1/2+1/4+1/6)*(1/2+1/4)简便计算求过程思路 跪谢答主爸爸
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