mechanical digital calculator

calculator Use in education

A student with the calculator.

In most developed countries, students use calculators for schoolwork. There was initially some resistance to this idea due to the fear that basic math skills could be affected. There is still a debate about the significance of being able to do calculations using a hand as well as "in the head," certain curricula prohibit calculator usage until a certain amount of proficiency is reached and others focusing in teaching estimation skills and solving problems.

There are additional concerns, for example the possibility that a student could utilize the calculator incorrectly but still believe it was the result provided to the calculator. Teachers attempt to counter this by encouraging students to estimate the result by hand and making sure it is in line with what is the calculatedresult. It is also possible for children to input the formula -1 x 1 and get the correct answer, which is 1 without understanding the concept involved. In this way, the calculator is more of a crutch than a tool for learning, and can cause a slowdown for students during exams as they look up even the most simple result using the calculator.

Other issues related to the use

Errors do not only affect students in schools. Anyone can trust the calculator's output without double-checking the size of the result--i.e. exactly where the decimal point is located. This issue was virtually absent in the age of pencil and paper calculations, where the job of determining the magnitudes of results was to be performed through the use of.

Certain fractions, like 2/3 are difficult to show on the calculator display since they are typically rounded to 0.66666667. Additionally, certain fractions like 0.14285714... could be difficult to identify in decimal form. In reality the number is 1/7. Certain of the more sophisticated scientific calculators can operate with vulgar fractions, however, the process in actual use is a bit awkward.Basic calculator

Calculators vs. computing

The main difference between calculators and the majority of computers is the fact that calculators are only tools for numeric calculations computer programs can use numbers to directly manipulate images, words, or even sounds, for instance.

It is true that the market of calculators is highly price-sensitive. generally, the consumer is concerned about the most expensive calculator with a particular features set. However, the user doesn't focus on speed (since speed is mostly limited by the speed at which the user is able to press the keys). Therefore, the designers of calculators try to reduce the amount of logic components that are on the chip, but not the amount of clock cycles required to perform a computation.

In this case, instead of an hardware multiplier for example, a calculator could implement floating-point math using code stored in ROMand calculate trigonometric functions using the CORDIC algorithm since CORDIC doesn't require floating-point. Similar to this, bit-serial logic designs are more prevalent in calculators while bit-parallel designs are the most popular on general-purpose computers. A bit-serial design reduces the complexity of the chip however it requires a lot more clock cycles.

Personal computers and digital assistants are able to perform general calculations in many ways:

  • There are a variety of programs that can be used to perform calculations, ranging from basic calculator emulators, through scientific calculators like Microsoft Calculator, to advanced spreadsheet applications like Excel and OpenOffice.org Calc.
  • Computer algebra software such as Mathematica, Maple, or Matlab are able to handle complex calculations.
  • Client-side scripting is a method of using to calculate, e.g. by entering "javascript:alert(calculation written in Javascript)" in a web browser's address bar (as opposed to "http://website name"). These calculations can be included in a separate Javascript as well as an HTML file, as well.
  • Online calculators like Google's calculator feature of Google's Google search engine are able to perform calculations on the server side.

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