﹣3-[﹣5+(1-0.2×3/4﹚×﹙﹣22/25﹚]=﹣3-[﹣5+(1-0.2×3/4﹚×﹙﹣25/22﹚]打错了

问题描述:

﹣3-[﹣5+(1-0.2×3/4﹚×﹙﹣22/25﹚]=
﹣3-[﹣5+(1-0.2×3/4﹚×﹙﹣25/22﹚]
打错了

﹣3-[﹣5+(1-0.2×3/4﹚×﹙﹣25/22﹚]
= ﹣3-[﹣5+17/20x(﹣25/22﹚]
= ﹣3-[﹣5+(﹣85/88﹚]
= ﹣3-(﹣5又85/88﹚
= ﹣3+5又85/88
= 2又85/88