(0.4+2/3)÷(5/6-0.75)×0.5
=(2/5+2/3)÷(5/6-3/4)×1/2
=(2/5+2/3)÷1/12×1/2
=16/15×12×1/2
=32/5
(0.4+2/3)÷(5/6-0.75)×0.5
1个回答
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