计算题(简便运算) (20-2/55×1)+(19-2/55×2)+(18-2/55×3)+…+(1-2/55×20)=?急快急快 答者重赏!急快禁止复制
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![计算题(简便运算) (20-2/55×1)+(19-2/55×2)+(18-2/55×3)+…+(1-2/55×20)=?急快急快 答者重赏!急快禁止复制](/uploads/image/z/311048-8-8.jpg?t=%E8%AE%A1%E7%AE%97%E9%A2%98%EF%BC%88%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97%EF%BC%89+%EF%BC%8820-2%2F55%C3%971%EF%BC%89%2B%EF%BC%8819-2%2F55%C3%972%EF%BC%89%2B%EF%BC%8818-2%2F55%C3%973%EF%BC%89%2B%E2%80%A6%2B%EF%BC%881-2%2F55%C3%9720%EF%BC%89%3D%3F%E6%80%A5%E5%BF%AB%E6%80%A5%E5%BF%AB+%E7%AD%94%E8%80%85%E9%87%8D%E8%B5%8F%21%E6%80%A5%E5%BF%AB%E7%A6%81%E6%AD%A2%E5%A4%8D%E5%88%B6)
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