[vjvjvjvjghv]

You could argue that a lot of the people who few up with calculators have lost any kind of mathematical intuition. I am always horrified how bad a lot of people are with simple math, interest rates and other things. This definitely opened up a lot of opportunities for companies to exploit this ignorance.

[rco8786]

This implies that people had better mathematical intuition, on average, pre calculator which seems difficult to believe.