递等式两道; 7x8.5+(3.5+1/4x10)除以5 101x1/5-1/5x2

问题描述:

递等式两道; 7x8.5+(3.5+1/4x10)除以5 101x1/5-1/5x2

7x8.5+(3.5+1/4x10)÷5=59.5+6÷5=60.7
101x1/5-1/5x2=20.2-0.4=19.8