-3/4x(-2/3) -8/5除以(-0.4)

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-3/4x(-2/3)-8/5除以(-0.4)-3/4x(-2/3)-8/5除以(-0.4)-3/4x(-2/3)-8/5除以(-0.4)(-3/4)*(-2/3)=1/2-8/5/(-0.4)=-1

-3/4x(-2/3) -8/5除以(-0.4)
-3/4x(-2/3) -8/5除以(-0.4)

-3/4x(-2/3) -8/5除以(-0.4)
(-3/4)*(-2/3)=1/2
-8/5/(-0.4)=-1.6/-0.4=4
记得采纳哟亲

1/2+4=9/2