diff --git a/README.md b/README.md
index 728eb70..578fab7 100644
--- a/README.md
+++ b/README.md
@@ -41,3 +41,4 @@
 29 / 5 = 5
 37 + 70 = 107
 21 / 3 = 7
+16 - 39 = -23