diff --git a/README.md b/README.md
index a2e15ab..8b6b7ad 100644
--- a/README.md
+++ b/README.md
@@ -29,3 +29,4 @@
 93 + 38 = 131
 47 - 90 = -43
 90 * 79 = 7110
+90 - 47 = 43