(0.8*19.85*0.125+0.075*0.125/0.625)*100-37.5*4用简便方法算
问题描述：
(0.8*19.85*0.125+0.075*0.125/0.625)*100-37.5*4用简便方法算
答
(0.8*19.85*0.125+0.075*0.125/0.625)*100-37.5*4
=(19.85*0.1+0.075/5)*100-150
198.5+1.5-150
=200-150
=500.075/5怎么回事呢0.125/0.625=1/5