用简便计算27.8*2/5+27.8/2+27.8/10
问题描述:
用简便计算27.8*2/5+27.8/2+27.8/10
答
27.8*2/5+27.8/2+27.8/10 =27.8×(2/5+1/2+1/10) =27.8×((4+5+1)/10) =27.8×1 =27.8
用简便计算27.8*2/5+27.8/2+27.8/10
27.8*2/5+27.8/2+27.8/10 =27.8×(2/5+1/2+1/10) =27.8×((4+5+1)/10) =27.8×1 =27.8