Heh. I've asked 4 adults this afternoon how they to do subtraction with regrouping and got two versions of the Austrian method (a German friend and my DH who learned subtraction in New Zealand), and two versions more like the American system shown in the first video, though both slightly simpler than that one. Now to figure out whether to teach my DD the method our schools use or the Austrian method, which I find far superior.

Obviously she can learn both but I know I have always been resentful of being forced to do things in a less efficient way and I worry she'll be the same and simply refuse the method our schools use if she likes the Austrian. Which may obviously cause problems if she encounters any "My way or the highway" teachers like Val is currently dealing with.