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数学
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用简便的方法算出:100-99+98-97+.+4-3+2-1
要有步骤
人气:441 ℃ 时间:2019-10-19 19:03:00
解答
100-99为一组=1
98-97为一组=1
以此类推
2-1为一组=1
一共50组,答案为50
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