Table of Contents
- 1 Why the numbers in calculator and phone are reversed?
- 2 Why are calculator and phone keypads different?
- 3 Why are keypads different?
- 4 Why are my calculators getting different answers?
- 5 Why is it called a 10 key calculator?
- 6 Why are the numbers 1 2 3 located at the top on the phone keyboard and at the bottom on the calculator?
- 7 Why do phone numbers have different numbers on different phones?
- 8 What is the correct order of digits in a phone number?
Why the numbers in calculator and phone are reversed?
One common explanation for the discrepancy between the phone and the calculator is that phone company engineers intentionally reversed the calculator layout because their research showed that people who were already adept at using a calculator punched the buttons too quickly for the telephone switching equipment to …
Why do calculators have numbers?
The reason was because calculators and phones were mechanical devices back then, and not electronic devices. It was the calculator which came much before telephones. It was mainly used by scientists & engineers. They had to deal with large numbers which involved lots of trailing zeroes as well.
Why are calculator and phone keypads different?
It is pretty odd that a calculator and a touch-tone telephone have exactly opposite layouts for their keypads, which have many identical components. The telephone designers figured that if they reversed the layout, the dialing speeds would decrease and the tone-recognition would be able to do its job more reliably.
What is difference between normal calculator and mobile calculator?
Normal calculator performs the function you entered ealier as soon as you press another function i.e. it performs 4+4 as soon as you press divide or any other function but smartphone is you know smart so performs the whole calculation as per BODMAS!
Why are keypads different?
The tone-recognition technology could not operate effectively at the speeds at which these specialists could dial the numbers. The telephone designers figured that if they reversed the layout, the dialing speeds would decrease and the tone-recognition would be able to do its job more reliably.
Why do different calculators get different answers?
Each calculator may have a different algorithm for calculating the answer. Each calculator may be programed to calculate a different degree of accuracy. Each calculator may have a different number of digits it can display.
Why are my calculators getting different answers?
But how come one calculator of the same brand said that the answer is 1? The difference has something to do with the mode or the program of the calculator. For one, not all calculators follow the order-of-operations hierarchy, which leads to a different interpretation of the equation.
Why is the numpad upside down?
Why is it called a 10 key calculator?
The original ten key was an adding machine; the three by three arrangement of keys was first used in 1911 on a machine invented by David Sundstrand of the Sundstrand Adding Machine Company. Most computers, even those without a separate number pad, usually have a ten key calculator accessory that displays on the screen.
Is a calculator always accurate?
Yes, pretty much every calculator is wrong since it operates on the finite precision representation of numbers so you cannot avoid rounding and a truncation.
Why are the numbers 1 2 3 located at the top on the phone keyboard and at the bottom on the calculator?
To resolve this, the engineering team hit upon the idea of conducting experiments with several kinds of keypad layouts and invited hundreds of people to use them & provide their feedback. People were more comfortable with a keypad layout which had 1-2-3 on top.
Why don’t calculators have the same keypad layout as telephones?
Try refreshing the page. It is pretty odd that a calculator and a touch-tone telephone have exactly opposite layouts for their keypads, which have many identical components. The reasons behind the differences are not known for certain, but a few theories exist. The first theory deals with the telephone’s circuitry and tone-recognition hardware.
Why do phone numbers have different numbers on different phones?
The reasons behind the differences are not known for certain, but a few theories exist. The first theory deals with the telephone’s circuitry and tone-recognition hardware.
Why do calculators have so many trailing zeros?
The reason was because calculators and phones were mechanical devices back then, and not electronic devices. It was the calculator which came much before telephones. It was mainly used by scientists & engineers. They had to deal with large numbers which involved lots of trailing zeroes as well.
What is the correct order of digits in a phone number?
Therefore it’s sensible to put digits 1, 2, and 3 to the bottom row, as it’s closer to the enter and also user reaches them easier. Since phone numbers are have limited number of digits and are in fact, randomly scattered, the Benford’s law doesn’t apply here, which means all the digits occur with similar frequencies.