On Friday, 11 January 2019 10:00:56 UTC, NY wrote:
Would you prefer to add up a column of prices in £p or in £sd, with
all the latter's carry-after-you-reach-12 and carry-after-you-reach-20
complications.

It's actually divide-and-carry which is worse if you don't know your 12 times table properly.

51d is 3d down and carry 4s over.

The "Back in time for school" programme last night (BBC2 I think) was teaching in centimetres "in the 1940s" which is wrong in so many ways.

Owain