(-1/42)÷【1/2-1/3+5/7+(-2/3)²*(-6)】怎么算?
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![(-1/42)÷【1/2-1/3+5/7+(-2/3)²*(-6)】怎么算?](/uploads/image/z/763464-48-4.jpg?t=%28-1%2F42%29%C3%B7%E3%80%901%2F2-1%2F3%2B5%2F7%2B%28-2%2F3%29%26%23178%3B%2A%28-6%29%E3%80%91%E6%80%8E%E4%B9%88%E7%AE%97%3F)
(-1/42)÷【1/2-1/3+5/7+(-2/3)²*(-6)】怎么算?
(-1/42)÷【1/2-1/3+5/7+(-2/3)²*(-6)】怎么算?
(-1/42)÷【1/2-1/3+5/7+(-2/3)²*(-6)】怎么算?
原式
=1/42÷[1/2-1/3+5/7+4/9*(-6)]
=1/42÷[3/6-2/6+5/7-8/3]
=1/42÷[1/6+5/7-16/6]
=1/42÷[7/42+30/42-112/42]
=1/42÷(37-112)/42
=1/42×42/(-75)
=-1/75