diff --git a/README.md b/README.md
index 347fe35..9e0e9bc 100644
--- a/README.md
+++ b/README.md
@@ -41,3 +41,4 @@
 60 * 13 = 780
 73 - 80 = -7
 70 / 3 = 23
+42 - 38 = 4