更新时间:2022-05-13 07:56:24 47次访问
A/B+A/C+A/D+A/E+A/F
=A(1/B+1/C+1/D+1/E+1/F)(提取公因式)
=A(CDEF+BDEF+BCEF+BCDE)/(BCDEF)(通分)
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