www.gsyw.net > 46.8×0.247,2.08×60,2.5×0.6%1.8×0.5请用简便方...

46.8×0.247,2.08×60,2.5×0.6%1.8×0.5请用简便方...

2.08×60 =2*60+0.08*60 =120+4.8 =124.8 ,2.5×0

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