diff --git a/README.md b/README.md
index 4948f4d..dabedfc 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,6 @@
 20 - 52 = -32
 88 + 70 = 158
 38 + 93 = 131
-28 - 56 = -28
 62 + 15 = 77
 80 / 4 = 20
 47 / 8 = 5