数学题(1+7/35)+(1+7/35*2+(1+7/35*3)=?

问题描述:

数学题(1+7/35)+(1+7/35*2+(1+7/35*3)=?
(1+7/35)+(1+7/35*2+(1+7/35*3)=?

原式=1+1+1+7/35*(1+2+3) =3+7/35*6 =21/5