I think this must be my first contribution to Wikipedia anywhere. (-: So be kind to me! -)
I have to own up to being a newby at JavaScript though I have been in computing since the 1960s.

I would be grateful for any suggestions or comments about my attempt to insert a description of the Math object.  The place where this appears (5.4) seems to need no more than this description does it.  Perhaps there should be more elsewhere about doing arithmetic.  E.G. There is no discussion of operator precedence or of rounding errors.  Wogga62