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数学7上：阅读理解找规律，计算1×2+2×3+3×4加到100×101的值
数学7上：阅读理解找规律，计算1×2+2×3+3×4加到100×101的值是多少？
初中数学，找规律列代数式，基础训练，培优专题71/124
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