I never consciously set out to teach my kids maths in this way, but I always discussed these things as we did them. My biggest one was probably price comparisons and why I chose what I did when shopping. When buying high cost items, like tech, appliances etc, we always check reviews and balance price with reliability. It's better to spend a bit more on something that will last rather than keep paying out for cheap items that break down. I say the same for clothes. If it's not what you really want, then better to go without than make do with something you then don't wear.

Something else we've always been big on is avoiding credit/loans. You pay back way more than you think, so if you must go that route, look to paying it back sooner if you can and make sure you don't get stuck in a debt cycle. We often talked to our girls about examples with that kind of thing.