作业帮.算了好久...[-5*（-1/3）²-0.8]/5又2/5[50-（7/9-11/12+1/6）*（-6）²]/（-7）²
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/12 12:42:37
![.算了好久...[-5*（-1/3）²-0.8]/5又2/5[50-（7/9-11/12+1/6）*（-6）²]/（-7）²](/uploads/image/z/7807536-0-6.jpg?t=.%E7%AE%97%E4%BA%86%E5%A5%BD%E4%B9%85...%5B-5%2A%EF%BC%88-1%2F3%EF%BC%89%26%23178%3B-0.8%5D%2F5%E5%8F%882%2F5%5B50-%EF%BC%887%2F9-11%2F12%2B1%2F6%EF%BC%89%2A%EF%BC%88-6%EF%BC%89%26%23178%3B%5D%2F%EF%BC%88-7%EF%BC%89%26%23178%3B)
.算了好久...[-5*（-1/3）²-0.8]/5又2/5[50-（7/9-11/12+1/6）*（-6）²]/（-7）²
.算了好久...
[-5*（-1/3）²-0.8]/5又2/5
[50-（7/9-11/12+1/6）*（-6）²]/（-7）²
.算了好久...[-5*（-1/3）²-0.8]/5又2/5[50-（7/9-11/12+1/6）*（-6）²]/（-7）²
[-5*（-1/3）²-0.8]/5又2/5=（-5*1/9-4/5)/27/5=(-25/45-36/45)*5/27=-61/45*5/27=-51/243
[50-（7/9-11/12+1/6）*（-6）²]/（-7）²=[50-(7/9-9/12)*36]/49=(50-28+27)/49=1