1.观察下面的几个算式:1+2+1=4 1+2+3+2+1=91+2+3+4+3+2+1=16 1+2+3+4+5+4+3+2+1=25(1).请你找出它的规律.2.利用 (1) 的规律,请你快速算出:1+2+3+……+99
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/18 00:51:21
![1.观察下面的几个算式:1+2+1=4 1+2+3+2+1=91+2+3+4+3+2+1=16 1+2+3+4+5+4+3+2+1=25(1).请你找出它的规律.2.利用 (1) 的规律,请你快速算出:1+2+3+……+99](/uploads/image/z/6112524-12-4.jpg?t=1%EF%BC%8E%E8%A7%82%E5%AF%9F%E4%B8%8B%E9%9D%A2%E7%9A%84%E5%87%A0%E4%B8%AA%E7%AE%97%E5%BC%8F%EF%BC%9A1%EF%BC%8B2%EF%BC%8B1%EF%BC%9D4+1%EF%BC%8B2%EF%BC%8B3%EF%BC%8B2%EF%BC%8B1%EF%BC%9D91%EF%BC%8B2%EF%BC%8B3%EF%BC%8B4%EF%BC%8B3%EF%BC%8B2%EF%BC%8B1%EF%BC%9D16+1%EF%BC%8B2%EF%BC%8B3%EF%BC%8B4%EF%BC%8B5%EF%BC%8B4%EF%BC%8B3%EF%BC%8B2%EF%BC%8B1%EF%BC%9D25%EF%BC%881%EF%BC%89%EF%BC%8E%E8%AF%B7%E4%BD%A0%E6%89%BE%E5%87%BA%E5%AE%83%E7%9A%84%E8%A7%84%E5%BE%8B%EF%BC%8E2%EF%BC%8E%E5%88%A9%E7%94%A8+%EF%BC%881%EF%BC%89+%E7%9A%84%E8%A7%84%E5%BE%8B%2C%E8%AF%B7%E4%BD%A0%E5%BF%AB%E9%80%9F%E7%AE%97%E5%87%BA%EF%BC%9A1%EF%BC%8B2%EF%BC%8B3%EF%BC%8B%E2%80%A6%E2%80%A6%EF%BC%8B99)
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