diff --git a/README.md b/README.md
index 8279144..fadaf4b 100644
--- a/README.md
+++ b/README.md
@@ -41,3 +41,4 @@
 47 / 2 = 23
 82 + 35 = 117
 10 - 41 = -31
+11 - 99 = -88