diff --git a/策划/数值计算中减法与乘法.md b/策划/数值计算中减法与乘法.md
index fd5bdd9..101ff80 100644
--- a/策划/数值计算中减法与乘法.md
+++ b/策划/数值计算中减法与乘法.md
@@ -1 +1,2 @@
-强调爽感用乘法，
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+强调爽感用乘法，强调克制用减法。
+https://mp.weixin.qq.com/s/oPLgjHewQVNr1P7RN9yDdA
\ No newline at end of file