(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=(0.8*19.85*0.125+0.075*0.125*1.6)*100-150=【0.8*0.125*(19.85+0.075*2)】*100-150=0.8*0.125*20*100-150=200-150=50