In this article, we propose a general solution to address this issue.

在本文中，我们建议采用一种综合解决方案解决此问题。

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This trick is a general solution for multiplying any single-digit number by 9.

这个技巧是应对任何个位数字乘以9的算式。

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This trick is a general solution for multiplying any single-digit number by 9.

这个技巧是应对任何个位数字乘以9的算式。

youdao