计算12+(-8)+11+(-2)+(-12).上预科班的,教教我还有几道:2.(-20.75)+(-3)+(-4.25)+(+19)3.6.35+(-0.6)+3.25+(-5.4)4.1+(-2)+3+(-4)+...+2007+(-2008)5.(-12.78)+(-6.37)+(+8.62)+(+4.73)6.(-8.25
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![计算12+(-8)+11+(-2)+(-12).上预科班的,教教我还有几道:2.(-20.75)+(-3)+(-4.25)+(+19)3.6.35+(-0.6)+3.25+(-5.4)4.1+(-2)+3+(-4)+...+2007+(-2008)5.(-12.78)+(-6.37)+(+8.62)+(+4.73)6.(-8.25](/uploads/image/z/7985589-69-9.jpg?t=%E8%AE%A1%E7%AE%9712%2B%28-8%29%2B11%2B%28-2%29%2B%28-12%29.%E4%B8%8A%E9%A2%84%E7%A7%91%E7%8F%AD%E7%9A%84%2C%E6%95%99%E6%95%99%E6%88%91%E8%BF%98%E6%9C%89%E5%87%A0%E9%81%93%EF%BC%9A2.%EF%BC%88-20.75%EF%BC%89%2B%EF%BC%88-3%EF%BC%89%2B%EF%BC%88-4.25%EF%BC%89%2B%EF%BC%88%2B19%EF%BC%893.6.35%2B%EF%BC%88-0.6%EF%BC%89%2B3.25%2B%EF%BC%88-5.4%EF%BC%894.1%2B%EF%BC%88-2%EF%BC%89%2B3%2B%EF%BC%88-4%EF%BC%89%2B...%2B2007%2B%EF%BC%88-2008%EF%BC%895.%EF%BC%88-12.78%EF%BC%89%2B%EF%BC%88-6.37%EF%BC%89%2B%EF%BC%88%2B8.62%EF%BC%89%2B%EF%BC%88%2B4.73%EF%BC%896.%EF%BC%88-8.25)
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