[(1.8-0.6)/?+2.5]*0.4=3.4 (不用方程做)

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[(1.8-0.6)/?+2.5]*0.4=3.4(不用方程做)[(1.8-0.6)/?+2.5]*0.4=3.4(不用方程做)[(1.8-0.6)/?+2.5]*0.4=3.4(不用方程做)[(1.

[(1.8-0.6)/?+2.5]*0.4=3.4 (不用方程做)
[(1.8-0.6)/?+2.5]*0.4=3.4 (不用方程做)

[(1.8-0.6)/?+2.5]*0.4=3.4 (不用方程做)
[(1.8-0.6)/?+2.5]*0.4=3.4
(1.8-0.6)/?+2.5=3.4 / 0.4 = 8.5
(1.8-0.6)/?=8.5 - 2.5 = 6
(1.8-0.6)/6=?
=0.2