5×0.6+2.4÷0.8-0.4怎样才能等于13.5

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5×0.6+2.4÷0.8-0.4怎样才能等于13.5
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5×0.6+2.4÷0.8-0.4怎样才能等于13.5
5×0.6+2.4÷0.8-0.4怎样才能等于13.5

5×0.6+2.4÷0.8-0.4怎样才能等于13.5
(5×0.6+2.4)÷(0.8-0.4)=13.5

(5×0.6+2.4)÷(0.8-0.4)=13.5

再加上7.9

(5×0.6+2.4)÷(0.8-0.4)
=(3+2.4)÷o.4
=5.4÷o.4
=13.5