All those minutes I wasted when subtracting any number from 1,000,000 in 6th class, when instead of renaming, I could have simply changed the million to 999,999 and subtracted from this instead then added one to my answer. Maybe if borrow and payback had been explained better, it might have survived.

Anseo.net #29 Newsletter
I used to make Top Trump Cards from Cereal Boxes
I hope you had a good St. Patrick’s Weekend. I’m delighted to release a second free online course and this time it comes with a