diff --git a/mobject/numbers.py b/mobject/numbers.py
index 1b90d352..e7724f45 100644
--- a/mobject/numbers.py
+++ b/mobject/numbers.py
@@ -117,6 +117,7 @@ class DecimalNumber(VMobject):
             # of animated mobjects
             mob.points[:] = 0
         self.number = number
+        return self
 
     def get_value(self):
         return self.number