计算 0.25*(-2.15)+0.75*(+3.15)/3=?_数学解答

计算 0.25*(-2.15)+0.75*(+3.15)/3=?

人气：261 ℃　时间：2020-04-11 02:56:28

解答

0.25*(-2.15)+0.75*(+3.15)/3
= 0.25*(-2.15)+0.25*3*(+3.15)/3
=0.25*(-2.15)+0.25*(+3.15)
=0.25*(3.15-2.15)
=0.25