Technology And Losing Our Basic Skills

A friend of mine always wore a hat and he was also going bald so i wondered to him whether it was the constant hat wearing that was making him bad and he replied that it didn't matter because if he wore a hat nobody would know he was bald anyway which in some strange way is quite logical but in some ways it plays into something i have long considered, that our technology is making us lose the basic skills we really need.   
When i was at school, calculators in maths lessons were banned and apart from a few lessons when it was specifically about how to use a calculator (where we spent most of the time entering 58008 and giggling) but our maths teachers had a 'use it or lose it' mentality which i appreciate now because where most of my generation can do simple maths in our heads, the younger generation seem to have a gap there.
Whether it is splitting a bill amongst a group or working out the cost of something after 20% is taken off in a sale, the younger generation will reach for their smartphone calculators whereas us older ones will work it through in our heads or on a bit of paper.
Many of my children's friends listen to audio books because they say it is quicker and they can do other things at the same time rather than sit still holding a book or Kindle but to me, a lifetime reader, that is not only missing the best part of book reading where you have the narrator and the scenery in your own head but reading is a basic skill we never stop learning.    
During my years in teaching, i noticed a quite shocking decline in Student's writing and use of English grammar but not in their word processed work but when they had to write something longhand. It didn't take a genius to work out that spellcheck and grammar checkers corrected everything but when it wasn't available, they struggled with almost every aspect of English from spelling to the correct use of punctuation marks.
I have heard that some young people are so used to digital clocks that they struggle to read the analogue version but using my hat wearing friends bald head as a template, the ability to not being able read a clock, perform simple mathematics, write a grammatically correct sentence or read anything complex is not a problem when you have a digital watch, calculator, spellchecker or audio reader to hand but when you don't, which i admit is becoming rare, the skills are just not there.   
My parents would take us on road trips and they would navigate the roads using a dashboard full of maps of cities which they would fold out on the bonnet of the car as they plotted the way to wherever it was we was heading but i couldn't do that now, my AA Route Planner Atlas hasn't seen the light of day since Satnav's became a thing and where i can remember telephone numbers i memorised from my childhood, i couldn't tell you many of the numbers in my mobile phone now because all i need to know is the name.   
Maybe it is more of a problem for people of my generation who risk losing the skills we learnt, it doesn't seem to bother the younger ones who i assume think we are the mugs for learning it in the first place when technology makes those skills redundant.