diff --git a/README.md b/README.md
index 2369478..05e4bef 100644
--- a/README.md
+++ b/README.md
@@ -41,3 +41,4 @@
 67 / 6 = 11
 57 / 3 = 19
 93 / 8 = 11
+58 - 87 = -29