2013年苏教版暑假作业数学五年级33页第一大题已知:2/1=1-2/1 6/1=2乘3/1=2/1-3/1 12/1=3乘4/1=3/1-4/1 根据上面式子反应的规律计算: 2/1+6/1+12/1+20/1+30/1+42/1+56/1+72/1+90/1(注
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![2013年苏教版暑假作业数学五年级33页第一大题已知:2/1=1-2/1 6/1=2乘3/1=2/1-3/1 12/1=3乘4/1=3/1-4/1 根据上面式子反应的规律计算: 2/1+6/1+12/1+20/1+30/1+42/1+56/1+72/1+90/1(注](/uploads/image/z/620034-42-4.jpg?t=2013%E5%B9%B4%E8%8B%8F%E6%95%99%E7%89%88%E6%9A%91%E5%81%87%E4%BD%9C%E4%B8%9A%E6%95%B0%E5%AD%A6%E4%BA%94%E5%B9%B4%E7%BA%A733%E9%A1%B5%E7%AC%AC%E4%B8%80%E5%A4%A7%E9%A2%98%E5%B7%B2%E7%9F%A5%EF%BC%9A2%2F1%3D1-2%2F1++++++++++6%2F1%3D2%E4%B9%983%2F1%3D2%2F1-3%2F1+++++++++++12%2F1%3D3%E4%B9%984%2F1%3D3%2F1-4%2F1++++++++++%E6%A0%B9%E6%8D%AE%E4%B8%8A%E9%9D%A2%E5%BC%8F%E5%AD%90%E5%8F%8D%E5%BA%94%E7%9A%84%E8%A7%84%E5%BE%8B%E8%AE%A1%E7%AE%97%EF%BC%9A++++++++++++2%2F1%2B6%2F1%2B12%2F1%2B20%2F1%2B30%2F1%2B42%2F1%2B56%2F1%2B72%2F1%2B90%2F1%EF%BC%88%E6%B3%A8)
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