Re: OT: Converting miles/km

kami wrote:

an easier method would be, if the limit is 80 miles per hour,
simply add half, which is 40 and then one tenth of that, which is
4 and multiply it by 2 which is 8, so 48 + 80 is 128 km/h

I find it easier to multiply by 1.6.

I once gave one of my pupils less than maximum for an answer. The
problem demanded that you do the math approximately. He had calculated
the precise answer in his head and clamid that it was just as quick
(which it was for him). He was displeased with my scoring.

--
Bertel
Kolt, Denmark