You know, when I first posted my last on this thread, I made a mistake (3^3 came out as 3^4 in my head). I knew the scale of the answer - and that's something I think we should be teaching, even if I could care less about the 19, or even the 7, times table - and realized I'd done something wrong. I looked at it for a minute, couldn't figure it out, (but knew 18x12 couldn't be bigger than 20x20) and pulled out my calculator. Why? Because it was easier to use it to double check than backing up and trying to figure out what was going on. Did I have to? No, but it would have taken longer and my ego doesn't need that much stroking. I play bridge; I expect to make mistakes.
I don't have a problem if people need a tool to figure out why I handed them $10.23 for the $9.98 bill (I do have an issue with those that move the change aside, add the two cents and expect me to take it.) I don't care if people need a crutch to work out 8x7 (or even 12x18), for the same reason that I don't care if anyone knows my phone number except me (and that only to fill out forms). They can still reach me when they need to, because their smartphone has my number, and when they get a new one, moving the contacts whole cloth is a couple of clicks. But my dad was famous for his ability to remember 7-character random strings (you know, phone numbers and license plates?) I don't have that skill, and it doesn't matter. I don't care if people have nice handwriting - or even can cursively write at all. Why? Because apart from signing a form or a cheque (and I do *that*, maybe, two or three times a year; I void more) nobody has to write. Type, swype, text, or just stick it in a "note program" and leave it in the aether to be found whenever. If you're a bridge player, get numbered stickers for the entry form. If you have to use old-fashioned technologies like a horse-and-cart or pencil-and-paper, printing is just fine, and frankly more legible in most cases.
I don't wear a watch, haven't for almost 10 years (except when I'm directing). I'm never anywhere where the time is more than a look over a shoulder, or at worst two keytaps or a buttonpress away (except when I'm directing). I certainly don't need to be able to tell time, either with an analog clock or "it's 1037. What time will it be in an hour and a half?" (as I said before, the answer is either "lunchtime" or "bedtime").
Note, however, that I have a pen (in fact, many, beautiful, pens); I can do mind arithmetic, and play Countdown for fun; all but one of "my" clocks are analog (and I'm still meaning to buy a CounterClock, because I'm an old UWaterloo CSC hack); and many other things that I think are elegant or useful or just plain cool. But I don't have a problem if others don't; because they, like math someone with a calculator can do as fast as I, are not *necessary*. 100, 50 years ago, they were; and guess how old the complainers (and, frankly, the curriculum setters and teachers) are?
Note that that doesn't mean that we don't need to teach basic math skills!
It does matter if people look at "57% of 300 million" and come up with either around 17 or around 520 million, because that's what the calculator said. It does matter if they don't realize that 650 million in a week is ludicrous, especially because that's twice the extant number. It does matter if they don't understand that 37 cases in over a billion, or 5 cases in 200 million, or even a 1 in 13.6million chance to win (potentially share) a prize of $5m, $2 a throw, is as close as all-get-out to zero to be ignorable, comparatively. It does matter (given that I am an engineer) that going from 176 in 2014 to 203 in 2015 is reported as a 15.34% increase or when a report of 160 000 of one disease and 256 of another get reported as 160 256 cases; it matters when the same tricks that were debunked in 1954's
"How to Lie With Statistics" (and, of course, were not new even then) still show up on TV screens every week, and still seduce a significant fraction of people (0.19, p<0.75 - in other words, I pulled that number out of thin air).
By the way, if you've never read that book, spend an hour or two with it. I don't think it will teach any of this audience much, but it's a lot of fun.
When I go to sea, don't fear for me, Fear For The Storm -- Birdie and the Swansong (tSCoSI)