9.8*5.6-46*0.98.(25-0.2)/(1/0.25)簡便運算

9.8*5.6-46*0.98.(25-0.2)/(1/0.25)簡便運算

式=9.8*5.6-(46/10)*(0.98*10)=9.8*5.6-4.6*9.8 =(5.6-4.6)*9.8 =1*9.8 =9.8