0.5×0.3×0.1×10＝0.15×0.1×10＝0.015×10＝0.15﹙m³﹚ 答：共需0.15立方米混凝土.
=10*（0.5*0.3*0.1)=0.15(立方米)
(50*30*10*10)/1000000
50cm=0.5m30cm=0.3m10cm=0.1mV=abh =0.5乘0.3乘0.1 =0.0150.015乘 10=0.15
