diff --git a/README.md b/README.md
index 2db0071..7bd18df 100644
--- a/README.md
+++ b/README.md
@@ -5,3 +5,4 @@
 - 10 - 20 =
 - 125 + 20 =
 - 10 * 10 =
+- 100 - 80 =