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(-四分之三)X(-1右二分之一)除以(-2右四分之一)=
人气:213 ℃ 时间:2019-11-14 00:13:13
解答
(3/4)*(-1又(1/2)/(-2又(1/4))
=(3/4)*(-3/2)/(-9/4)
=(3/4)*(-3/2)*(-4/9)
=(3/4)*(-4/9)*(-3/2)
=(-1/3)*(-3/2)
=1/2
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