Apparently August is Australian Poetry Month. Since I write poetry and am Australian I guess I should take part.

Here’s my little contribution. Something new, therefore unpolished.

Postal maths

What’s mine is delivered next door.
What’s yours is brought to me.
Hence getting mail to (any of) our addresses is what postal maths is for.
What goes around, comes around, we residents (without discussion) agree.

However due to complicated critical calculations we mail receivers have turned co-deliverers and must interpret the formulae mathematical.
Thus 3/1 sees mail going to one, two, four and 2/1 and as there is no longer a Number Three, you see, due to that singular address being subdivided into a set of numbers, which is new, entirely.
Thus, 3/1 is three divided by itself and as no one person recalls, it is sent to Number One occasionally. But 3/1 is also read as three plus one, which is sent to Number Four, we perceive easily.
But in reverse, Number Four could also be taken to mean 3/1 so there let the mail be.

As for plusses so with minuses and 3/1 can equal Number Two for mail, canonically. And we suppose it is the same that Number Two can be sent to 3/1 magically.
Yet 3/1 can equate to 2/1 apparently, and while that seems a dialectical mystery, here we calculate based on how those particular numbers are aligned, as it were, neighbourly.
Thus, that’s postal maths explained practically, but please feel free to adjust for your own street or town, as you each must, circumstantially.
As for postal maths’ deep provenance and storied, arcane history?
Those ancient texts of operations, we were told as we are somewhat quizzical, disappeared a while ago accidentally, but we hope they might be rediscovered one day as an anomaly statistical, and auctioned off as undelivered long lost public property.