9·32×0·57+0·73+×15·7-0·662×5·7怎样简便?
问题描述:
9·32×0·57+0·73+×15·7-0·662×5·7怎样简便?
答
9.32×0.57-6.62×0.57+0.73×15.7原式=(9.32-6.62)×0.57+0.73×15=2.7×0.57+7.3×1+7.3×0.57=(2.7+7.3)×0.57+7.3=5.7+7.3=13