1/1*5+1/5*10+1/10*15.+1/45*50等于多少?请用简便算法
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![1/1*5+1/5*10+1/10*15.+1/45*50等于多少?请用简便算法](/uploads/image/z/14723789-5-9.jpg?t=1%2F1%2A5%2B1%2F5%2A10%2B1%2F10%2A15.%2B1%2F45%2A50%E7%AD%89%E4%BA%8E%E5%A4%9A%E5%B0%91%3F%E8%AF%B7%E7%94%A8%E7%AE%80%E4%BE%BF%E7%AE%97%E6%B3%95)
1/1*5+1/5*10+1/10*15.+1/45*50等于多少?请用简便算法
1/1*5+1/5*10+1/10*15.+1/45*50
等于多少?请用简便算法
1/1*5+1/5*10+1/10*15.+1/45*50等于多少?请用简便算法
1/1*5+1/5(1/5-1/10+1/10-1/15+1/15……+1/40-1/45+1/45-1/50)=1/5+1/5(1/5-1/50)=59/250