diff --git a/README.md b/README.md
index 89cc8dd..591b6f7 100644
--- a/README.md
+++ b/README.md
@@ -41,3 +41,4 @@
 10 * 50 = 500
 30 + 77 = 107
 16 + 85 = 101
+57 - 55 = 2