.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
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![.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