This makes me feel absolutely ancient. I was 9. I remember lots of work in Maths lessons at school to get us used to decimal coinage and we all got used to the new money very quickly. As I recall, many older people struggled, possibly because of poor numeracy, but resistance to change was a big part of it. There were also complaints that when retailers converted prices to the new money many took the opportunity to round up rather than down, or just increase the prices, so many people felt they were being ripped off.
I don't recall doing many money sums in Maths before this point, probably because teachers knew we wouldn't need that skill for very long. They must have been so hard.
A shopper's purchases come to 6/11. How much change should she expect if she pays with a 10/- note?
A clock costs £1-5-0. What would be the cost of buying 17 such clocks?
For the record, this is how it worked.
£1 was made up of 20 shillings. Each shilling was made up of 12 pennies. We also had halfpennies. By the time I was born, the farthing (a quarter of a penny) was no longer in use. The coins we had were:
Halfpenny (usually known as a ha'penny, pronounced haypenny)*
Penny, a large brown coin
Threepenny (usually pronounced thruppeny) bit (brassy colour, thick, 12-sided)
Sixpence, silver, small
Shilling, silver, bit bigger than a sixpence
Two shilling bit (florin), also silver, bigger and thicker than a shilling
Half a crown (two shillings sixpence)*
Ten shilling note
Pound note
*- although now I've checked I see these ceased to be legal tender a few years before decimalisation
On decimalisation:
Old penny and thruppeny bit ceased to be legal tender
New coins introduced: 1/2p, 1p, 2p, 5p, 10p
Sixpence = 2 1/2 new pence, withdrawn in 1980
One shilling = 5 new pence, so the old shilling coins continued in use
Ten shillings = 50 new pence (eventually the note was replaced by the 50p coin)
£1 = 100 new pence
20p coin introduced 1982. The new halfpennies are no longer legal tender.
Anybody else remember the old coins? I think we still have a set knocking about somewhere.