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(-20/81)×1.25÷(-8/1)=
人气:342 ℃ 时间:2020-04-30 07:26:58
解答
(-20/81)×1.25÷(-8/1)
=(-20/81)×(4/5) ×(-8)
=[ (-20/81)×(-2) ] × [(4/5)×4]
=10/81×5
=2/81
=40.5
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