(-2.39)+(+3.57)+(-7.61)+(-1.57)怎么算?
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![(-2.39)+(+3.57)+(-7.61)+(-1.57)怎么算?](/uploads/image/z/169319-47-9.jpg?t=%28-2.39%29%2B%28%2B3.57%29%2B%28-7.61%29%2B%28-1.57%29%E6%80%8E%E4%B9%88%E7%AE%97%3F)
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(-2.39)+(+3.57)+(-7.61)+(-1.57)怎么算?
(-2.39)+(+3.57)+(-7.61)+(-1.57)怎么算?
(-2.39)+(+3.57)+(-7.61)+(-1.57)怎么算?
负的相当于减,这道题相当于3.57-2.39-7.61-1.57=-8