diff --git a/README.md b/README.md
index 33f638b..0d647bd 100644
--- a/README.md
+++ b/README.md
@@ -41,3 +41,4 @@
 52 + 77 = 129
 71 + 97 = 168
 58 * 7 = 406
+87 - 98 = -11