(0.8*19.85*0.125+0.075*0.125/0.625)*100-37.5*4用简便方法算

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(0.8*19.85*0.125+0.075*0.125/0.625)*100-37.5*4用简便方法算(0.8*19.85*0.125+0.075*0.125/0.625)*100-37.5*4用简

(0.8*19.85*0.125+0.075*0.125/0.625)*100-37.5*4用简便方法算
(0.8*19.85*0.125+0.075*0.125/0.625)*100-37.5*4用简便方法算

(0.8*19.85*0.125+0.075*0.125/0.625)*100-37.5*4用简便方法算
(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