负三减(负五加(1减三分之二乘零点六)乘负三分之 - 知识问答

负三减(负五加(1减三分之二乘零点六)乘负三分之一)等于多少?

3个回答

原式=-3-[-5+(1-2/3×0.6)×(-1/3)]
=-3-[-5+(1-2/3×3/5)×(-1/3)]
=-3-[-5+(1-2/5)×(-1/3)]
=-3-[-5+3/5×(-1/3)]
=-3-(-5-1/5)
=-3+5+1/5
=2+1/5
=11/5

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