diff --git a/README.md b/README.md
index f9c3cc6..9ce3efb 100644
--- a/README.md
+++ b/README.md
@@ -41,3 +41,4 @@
 54 * 12 = 648
 75 / 1 = 75
 48 + 16 = 64
+32 - 21 = 11