diff --git a/README.md b/README.md
index c6ee372..976c0e3 100644
--- a/README.md
+++ b/README.md
@@ -34,3 +34,4 @@
 11 / 10 = 1
 96 + 98 = 194
 70 * 60 = 4200
+2 - 4 = -2