wrote in message
oups.com...
I remember my dad explaining it to me at the time. I think I eventually
grasped it. I was 9 years old at the time.

I explained the concept [of negative numbers] to my dad when I was
about 9 years old. I don't think he ever really understood.

That would be the reason why you alway ended up owing him your pocket money

--
Col

Bolton, Lancashire
160m asl