diff --git a/.vs/ProjectSettings.json b/.vs/ProjectSettings.json
new file mode 100644
index 0000000..866f1e1
--- /dev/null
+++ b/.vs/ProjectSettings.json
@@ -0,0 +1,3 @@
+{
+  "CurrentProjectSetting": null
+}
\ No newline at end of file
diff --git a/.vs/VSWorkspaceState.json b/.vs/VSWorkspaceState.json
new file mode 100644
index 0000000..9568b22
--- /dev/null
+++ b/.vs/VSWorkspaceState.json
@@ -0,0 +1,6 @@
+{
+  "ExpandedNodes": [
+    ""
+  ],
+  "PreviewInSolutionExplorer": false
+}
\ No newline at end of file
diff --git a/.vs/apptive_pr_practice/v16/.suo b/.vs/apptive_pr_practice/v16/.suo
new file mode 100644
index 0000000..4ae7ba6
Binary files /dev/null and b/.vs/apptive_pr_practice/v16/.suo differ
diff --git a/.vs/slnx.sqlite b/.vs/slnx.sqlite
new file mode 100644
index 0000000..822e4a9
Binary files /dev/null and b/.vs/slnx.sqlite differ
diff --git a/calculator.py b/calculator.py
index 90f5426..8a17e73 100644
--- a/calculator.py
+++ b/calculator.py
@@ -11,21 +11,30 @@ def multiply(a, b):
 
 
 def divide(a, b):
-    pass
+    print( a/b)
 
 
 def pow(a, b):
     pass
 
-
 def abs(a):
-    pass
+    if a > 0 :
+        print( a)
+    else :
+        print( -a)
 
 
 def mod(a, b):
-    pass
+    print( a%b)
+
 
 
 if __name__ == "__main__":
     # 간단한 테스트 코드
-    pass
\ No newline at end of file
+    add(1,2)
+    subtract(3,2)
+    multiply(3,4)
+    divide(8,2)
+    pow(9,3)
+    abs(5)
+    mod(8,2)
\ No newline at end of file