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5/16x7/13x11/10x26/49等于几?

分数乘法,任务就是约分, 约分后,得到11/112。

3/1x2x4x5+4/2x3x5x6+5/3x4x6x7++12/10x11x13x14=.

5/42×7/15+13/22×11/26 =(5/15)×(7/42)+(13/26)/(11/

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