Update 198.md

jackzhenguo · web-flow · commit 4bfedb41ebc2 · 2021-07-09T18:07:17.000+08:00
diff --git a/md/198.md b/md/198.md
@@ -6,7 +6,7 @@
 @version 
 @date 2020/04/05
 ```
-## 198 常见算术运算
+## 1 常见算术运算
 
 ```python
 x, y = 3, 2
