diff --git a/src/subtract.py b/src/subtract.py
new file mode 100644
index 0000000..d6330a0
--- /dev/null
+++ b/src/subtract.py
@@ -0,0 +1,6 @@
+def subtract(a, b):
+    try:
+        return(float(a) - float(b))
+    except ValueError:
+        return "숫자를 입력하십시오."
+# 뺄셈 구현
\ No newline at end of file