Make cells negative based upon the value of another

Question

I'm able to colour cells based upon the value of another with the code below, which I found on this forum

Sub ColorMeElmo()
   Dim i As Long, r1 As Range, r2 As Range

   For i = 2 To 100
      Set r1 = Range("D" & i)
      Set r2 = Range("A" & i & ":C" & i)
      If r1.Value = "Aankoop" Then r2.Interior.Color = vbRed
      If r1.Value = "Verkoop" Then r2.Interior.Color = vbBlue
      If r1.Value = "Dividend" Then r2.Interior.Color = vbYellow
   Next i
End Sub

Now I'm trying to make cells negative or possitive based upon the value of r1. I tried this:

If r1.Value = "Verkoop" Then r2.Value = r2.Value * (-1)

Answer 1

Issue seems to be that r2 contains multiple cells hence below code will not work

If r1.Value = "Verkoop" Then r2.Value = r2.Value * (-1)

This needs to be changed to

If r1.Value = "Verkoop" Then 
 For Each c In r2.Cells 
     c.Value = c.Value * (-1)
 Next
End if