This file contains ambiguous Unicode characters that may be confused with others in your current locale. If your use case is intentional and legitimate, you can safely ignore this warning. Use the Escape button to highlight these characters.
话题10。大约在公元628年左右，印度数学家婆罗摩芨多（Brahmagupta，约598-665）给出了负数的四则运算。
通过上面的讨论可以看到，负数与减法运算关系密切，而减法运算又依赖于加法运算，关于这个问题更详细的讨论参见
