diff --git a/README.md b/README.md
index 955e1ad..951bf64 100644
--- a/README.md
+++ b/README.md
@@ -41,3 +41,4 @@
 99 * 46 = 4554
 9 / 8 = 1
 44 * 15 = 660
+67 - 45 = 22