diff --git a/README.md b/README.md
index 637453a..29a4592 100644
--- a/README.md
+++ b/README.md
@@ -41,3 +41,4 @@
 8 / 4 = 2
 37 - 75 = -38
 75 + 30 = 105
+87 + 4 = 91