diff --git a/README.md b/README.md
index 1f97d7d..7897a9c 100644
--- a/README.md
+++ b/README.md
@@ -41,3 +41,4 @@
 55 / 10 = 5
 80 + 49 = 129
 93 - 2 = 91
+11 - 48 = -37