Sub Replace_0()
Dim ws As Worksheet
Dim Last_Row As Long
Application.ScreenUpdating = False
For Each ws In ThisWorkbook.Worksheets
With ws
If .Name Like "*simple*" Then
Last_Row = .Range("A" & Rows.Count).End(xlUp).Row
Range(.Cells(1, 6), .Cells(Last_Row, 6)).SpecialCells(xlCellTypeBlanks) = 0
End If
End With
Next ws
Application.ScreenUpdating = True
End Sub