diff --git a/README.md b/README.md
index 5b280b0..ebb7f55 100644
--- a/README.md
+++ b/README.md
@@ -41,3 +41,4 @@
 80 + 28 = 108
 61 * 42 = 2562
 87 / 7 = 12
+56 - 1 = 55