314*0.15+31.4*3.8+3.14*47 简便计算
问题描述:
314*0.15+31.4*3.8+3.14*47 简便计算
答
314*0.15+31.4*3.8+3.14*47 =314*(0.15+0.38+0.47)=314
答
314*0.15+31.4*3.8+3.14*47
=3.14*15+3.14*38+3.14*47
=3.14*(15+38+47)
=3.14*100
=314