请用简便方法计算二点零四乘以零点二五乘以七点二乘以十二点五
问题描述：
请用简便方法计算二点零四乘以零点二五乘以七点二乘以十二点五
答
2.04*0.25*7.2*12.5
=0.51*(4*0.25)*9*(0.8*12.5)
=0.51*1*9*10
=45.9