diff --git a/README.md b/README.md
index 578fab7..105de70 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,6 @@
 44 + 36 = 80
 43 - 84 = -41
 30 + 77 = 107
-57 - 55 = 2
 69 * 71 = 4899
 57 / 9 = 6
 72 / 8 = 9