(3/8+1/27)*7+17/29+1/27该怎么算

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(3/8+1/27)*7+17/29+1/27该怎么算
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(3/8+1/27)*7+17/29+1/27该怎么算
(3/8+1/27)*7+17/29+1/27该怎么算

(3/8+1/27)*7+17/29+1/27该怎么算
(3/8+1/27)*7+17/29+1/27
=21/8+7/27+17/29+1/27
=21/8+8/27+17/29
=(21*27*29+8*8*29+14*27*8)/(8*27*29)
=21323/6264