diff --git a/calculator.py b/calculator.py
new file mode 100644
index 0000000..11a99ec
--- /dev/null
+++ b/calculator.py
@@ -0,0 +1,9 @@
+"""
+Calculator library containing basic math operations.
+"""
+
+def add(first_term, second_term):
+    return first_term + second_term
+
+def subtract(first_term, second_term):
+    return first_term - second_term
\ No newline at end of file