diff --git a/README.md b/README.md
index 75cefc9..a021ea8 100644
--- a/README.md
+++ b/README.md
@@ -42,3 +42,4 @@
 1 / 3 = 0
 7 * 77 = 539
 73 + 43 = 116
+85 - 70 = 15