diff --git a/README.md b/README.md
index 7540af0..a2d0402 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,6 @@
 62 + 15 = 77
 82 + 35 = 117
 10 - 41 = -31
-11 - 99 = -88
 80 / 4 = 20
 47 / 8 = 5
 25 / 3 = 8