diff --git a/概念/乘法.md b/概念/乘法.md
index 04eeedd..9ffb876 100644
--- a/概念/乘法.md
+++ b/概念/乘法.md
@@ -46,4 +46,4 @@ $\begin{array}{ccc}
 
 - 交换律 $a \times b = b \times a$
 - 结合律 $(a \times  b) \times c = a \times (b \times c)$
-- 分配律 $a \times (b+c)= a\times b + a\times c$
\ No newline at end of file
+- 分配律 $a \times (b+c)= a\times b + a\times c$