1*9+2 12*9+3 123*9+6 的规律 - 百度知道
10 September 2025 admin
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如果我没猜错题目应该是1*9+2 12*9+3 123*9+4 的规律吧 分别等于 11 111 1111 11111 为什么呢？ 首先数字*9相当于在后面填0减去本身 例： 1234567*9=12345670-1234567 写成竖式后你会发现前面全是1除了最后两位相差是有规律的 加上有规矩的2345就正好全是1了 说不明白大家自己算算就知道了
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