2.75—0.5*5.4用简便方法怎么算
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2.75—0.5*5.4用简便方法怎么算
2.75—0.5*5.4用简便方法怎么算
2.75—0.5*5.4用简便方法怎么算
2.75-0.5×5.4
=0.5×5.5-0.5×5.4
=0.5×(5.5-5.4)
=0.5×0.1
=0.05