计算.(-5)×(-87/9)-(-7)×(+79/9)+12÷(-9/79)不好意思,问题弄错了应该是(-5)×(-79/9)-(-7)×(+79/9)+12÷(-9/79)
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![计算.(-5)×(-87/9)-(-7)×(+79/9)+12÷(-9/79)不好意思,问题弄错了应该是(-5)×(-79/9)-(-7)×(+79/9)+12÷(-9/79)](/uploads/image/z/619197-69-7.jpg?t=%E8%AE%A1%E7%AE%97.%28-5%29%C3%97%28-87%2F9%29-%28-7%29%C3%97%28%EF%BC%8B79%2F9%29%2B12%C3%B7%28-9%2F79%29%E4%B8%8D%E5%A5%BD%E6%84%8F%E6%80%9D%2C%E9%97%AE%E9%A2%98%E5%BC%84%E9%94%99%E4%BA%86%E5%BA%94%E8%AF%A5%E6%98%AF%28-5%29%C3%97%28-79%2F9%29-%28-7%29%C3%97%28%EF%BC%8B79%2F9%29%2B12%C3%B7%28-9%2F79%29)
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计算.(-5)×(-87/9)-(-7)×(+79/9)+12÷(-9/79)不好意思,问题弄错了应该是(-5)×(-79/9)-(-7)×(+79/9)+12÷(-9/79)
计算.(-5)×(-87/9)-(-7)×(+79/9)+12÷(-9/79)
不好意思,问题弄错了应该是(-5)×(-79/9)-(-7)×(+79/9)+12÷(-9/79)
计算.(-5)×(-87/9)-(-7)×(+79/9)+12÷(-9/79)不好意思,问题弄错了应该是(-5)×(-79/9)-(-7)×(+79/9)+12÷(-9/79)
(-5)×(-87/9)-(-7)×(+79/9)+12÷(-9/79)
=5×87/9+7×79/9-12×79/9
=5×87/9+79/9*(7-12)
=5×87/9-5×79/9
=5/9×(87-79)
=5/9×8
=40/9
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