diff --git a/README.md b/README.md
index bc9fea4..837e4a8 100644
--- a/README.md
+++ b/README.md
@@ -41,3 +41,4 @@
 62 + 15 = 77
 47 / 2 = 23
 82 + 35 = 117
+10 - 41 = -31