Question

3.4除以中括号0.85乘小括号1.4减1.2小括号中括号怎样简便计算公式

Answer 1

3.4/[0.85*(1.4-1.2)]=3.4/(0.85*0.2)=3.4/[0.17*5*0.2]=3.4/0.17=340/17=20