Grr. Took me ages to write this out . . the then tes lost my post.
Should have saved it of course.
It
is equal addition, because each time you borrow
you do the same to the column you've borrowed from .
Actually if you think in
terms of columns all the time it is easier'.
So starting with the units column
6

4
= 2
quite simple as no borrowing involved.
Then look at the
tens column
10 6 can't take 3 from 0, so '
borrow' /
add 100 from h..column

54 3 4 & add 100 to the 400 making it
500/ 'doing the same'
=
7 2 (
100  30)
hundreds column
10 0 6
can't take 4 from 0, so add 1000 from th. column
32 54 3 4 & add 1000 to 2000, making it
3000 to add the same i e equal
=
5 7 2 because
now is 10  5
thousands column
3 0 0 6 (don't need to add or equalise)

324 3 4 (2000 became
3000 from previous equalisation)
=
0 5 7 2 because now
became 3  3
and finally 10 th,
2 3 0 0 6

2 4 3 4 again simple as nothing to take away.
2 0 5 7 2
So it's not as complicated and I'm not maths trained, so hope that makes it somewhat clearer.
Arrgh!
And now the formatting's gone.
took me half an hour and now the columns won't go where I put them. Perhaps try in QUOTE mode as it seems to show up correctly In preview?
Click to expand...