diff --git a/sources/src/main/java/pr2/vererbung/ueberladen_summe/Summator.java b/sources/src/main/java/pr2/vererbung/ueberladen_summe/Summator.java
index f69bfe5..8f77dfb 100644
--- a/sources/src/main/java/pr2/vererbung/ueberladen_summe/Summator.java
+++ b/sources/src/main/java/pr2/vererbung/ueberladen_summe/Summator.java
@@ -2,4 +2,19 @@ package pr2.vererbung.ueberladen_summe;
 
 public class Summator {
 
+    public int sum(int a, int b) {
+        return a + b;
+    }
+    
+    public int sum(int a, int b, int c) {
+        return a + b + c;
+    }
+    
+    public int sum(int a, int b, int c, int d) {
+        return a + b + c + d;
+    }
+    
+    public int sum(int a, int b, int c, int d, int e) {
+        return a + b + c + d + e;
+    }
 }
diff --git a/sources/src/main/java/pr2/vererbung/ueberladen_summe/test/SummatorTest.java b/sources/src/main/java/pr2/vererbung/ueberladen_summe/test/SummatorTest.java
index 5d3496b..059053f 100644
--- a/sources/src/main/java/pr2/vererbung/ueberladen_summe/test/SummatorTest.java
+++ b/sources/src/main/java/pr2/vererbung/ueberladen_summe/test/SummatorTest.java
@@ -9,15 +9,15 @@ public class SummatorTest {
 
     @Test
     void testSum() {
-// TODO: Einkommentieren
-//        Summator s = new Summator();
-//        assertEquals(3, s.sum(1, 2));
-//        assertEquals(1, s.sum(-1, 2));
-//        assertEquals(6, s.sum(1, 2, 3));
-//        assertEquals(0, s.sum(1, 2, -3));
-//        assertEquals(10, s.sum(1, 2, 3, 4));
-//        assertEquals(2, s.sum(1, 2, 3, -4));
-//        assertEquals(15, s.sum(1, 2, 3, 4, 5));
-//        assertEquals(5, s.sum(1, 2, 3, 4, -5));
+        
+        Summator s = new Summator();
+        assertEquals(3, s.sum(1, 2));
+        assertEquals(1, s.sum(-1, 2));
+        assertEquals(6, s.sum(1, 2, 3));
+        assertEquals(0, s.sum(1, 2, -3));
+        assertEquals(10, s.sum(1, 2, 3, 4));
+        assertEquals(2, s.sum(1, 2, 3, -4));
+        assertEquals(15, s.sum(1, 2, 3, 4, 5));
+        assertEquals(5, s.sum(1, 2, 3, 4, -5));
     }
 }