diff --git a/ClosedXML/ClosedXML/ClosedXML.sln b/ClosedXML/ClosedXML/ClosedXML.sln
index 6cad801..507e162 100644
--- a/ClosedXML/ClosedXML/ClosedXML.sln
+++ b/ClosedXML/ClosedXML/ClosedXML.sln
@@ -102,8 +102,8 @@
 		{BD5E6BFE-E837-4A35-BCA9-39667D873A20}.Debug|x86.Build.0 = Debug|x86
 		{BD5E6BFE-E837-4A35-BCA9-39667D873A20}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{BD5E6BFE-E837-4A35-BCA9-39667D873A20}.Release|Any CPU.Build.0 = Release|Any CPU
-		{BD5E6BFE-E837-4A35-BCA9-39667D873A20}.Release|Mixed Platforms.ActiveCfg = Release|x64
-		{BD5E6BFE-E837-4A35-BCA9-39667D873A20}.Release|Mixed Platforms.Build.0 = Release|x64
+		{BD5E6BFE-E837-4A35-BCA9-39667D873A20}.Release|Mixed Platforms.ActiveCfg = Release|Any CPU
+		{BD5E6BFE-E837-4A35-BCA9-39667D873A20}.Release|Mixed Platforms.Build.0 = Release|Any CPU
 		{BD5E6BFE-E837-4A35-BCA9-39667D873A20}.Release|x64.ActiveCfg = Release|x64
 		{BD5E6BFE-E837-4A35-BCA9-39667D873A20}.Release|x64.Build.0 = Release|x64
 		{BD5E6BFE-E837-4A35-BCA9-39667D873A20}.Release|x86.ActiveCfg = Release|Any CPU
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeBase.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeBase.cs
index 5b215d7..559a675 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeBase.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeBase.cs
@@ -737,7 +737,12 @@
 
         public XLCell Cell(XLAddress cellAddressInRange)
         {
-            var absoluteAddress = cellAddressInRange + RangeAddress.FirstAddress - 1;
+            //var absoluteAddress = cellAddressInRange + RangeAddress.FirstAddress - 1;
+            var absoluteAddress = new XLAddress(cellAddressInRange.Worksheet,
+                                 cellAddressInRange.RowNumber + RangeAddress.FirstAddress.RowNumber - 1,
+                                 cellAddressInRange.ColumnNumber + RangeAddress.FirstAddress.ColumnNumber - 1,
+                                 cellAddressInRange.FixedRow,
+                                 cellAddressInRange.FixedColumn);
 
             if (absoluteAddress.RowNumber <= 0 || absoluteAddress.RowNumber > XLHelper.MaxRowNumber)
             {
@@ -861,11 +866,22 @@
 
         public XLRange Range(IXLRangeAddress rangeAddress)
         {
-            var newFirstCellAddress = (XLAddress)rangeAddress.FirstAddress + RangeAddress.FirstAddress - 1;
+
+            var newFirstCellAddress = new XLAddress((XLWorksheet)rangeAddress.FirstAddress.Worksheet,
+                                 rangeAddress.FirstAddress.RowNumber + RangeAddress.FirstAddress.RowNumber - 1,
+                                 rangeAddress.FirstAddress.ColumnNumber + RangeAddress.FirstAddress.ColumnNumber - 1,
+                                 rangeAddress.FirstAddress.FixedRow,
+                                 rangeAddress.FirstAddress.FixedColumn);
+
             newFirstCellAddress.FixedRow = rangeAddress.FirstAddress.FixedRow;
             newFirstCellAddress.FixedColumn = rangeAddress.FirstAddress.FixedColumn;
 
-            var newLastCellAddress = (XLAddress)rangeAddress.LastAddress + RangeAddress.FirstAddress - 1;
+            var newLastCellAddress = new XLAddress((XLWorksheet)rangeAddress.LastAddress.Worksheet,
+                                rangeAddress.LastAddress.RowNumber + RangeAddress.FirstAddress.RowNumber - 1,
+                                rangeAddress.LastAddress.ColumnNumber + RangeAddress.FirstAddress.ColumnNumber - 1,
+                                rangeAddress.LastAddress.FixedRow,
+                                rangeAddress.LastAddress.FixedColumn);
+
             newLastCellAddress.FixedRow = rangeAddress.LastAddress.FixedRow;
             newLastCellAddress.FixedColumn = rangeAddress.LastAddress.FixedColumn;
 
diff --git a/ClosedXML/ClosedXML/ClosedXML_Sandbox/Program.cs b/ClosedXML/ClosedXML/ClosedXML_Sandbox/Program.cs
index 7a96b36..8024764 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Sandbox/Program.cs
+++ b/ClosedXML/ClosedXML/ClosedXML_Sandbox/Program.cs
@@ -21,7 +21,7 @@
             var end = DateTime.Now;
             Console.WriteLine((end - start).TotalSeconds);
             Console.WriteLine("Done");
-            Console.ReadKey();
+            //Console.ReadKey();
         }
     }