4除以2又二分之一的商加0.6的和,再於七分之一相乘,積是多少?

4除以2又二分之一的商加0.6的和,再於七分之一相乘,積是多少?


(4÷5/2+3/5)×1/7=11/35



(-四分之三)X(-1右二分之一)除以(-2右四分之一)=


(3/4)*(-1又(1/2)/(-2又(1/4))
=(3/4)*(-3/2)/(-9/4)
=(3/4)*(-3/2)*(-4/9)
=(3/4)*(-4/9)*(-3/2)
=(-1/3)*(-3/2)
=1/2