Basic Functions
Addition
The addition (sum function) is used by clicking on the "+" button or using the keyboard. The function results in a+b. Subtraction
The subtraction (minus function) is used by clicking on the "" button or using the keyboard. The function results in ab. Multiplication
The multiplication (times function) is used by clicking on the "x" button or using the keyboard "*" key. The function results in a*b. Division
The division (divide function) is used by clicking on the "/" button or using the keyboard "/" key. The function results in a/b. Sign
The sign key (negative key) is used by clicking on the "()" button. The function results in 1*x. Square
The square function is used by clicking on the "x^2" button or type "^2". The function results in x*x. Square Root
The square root function is used by clicking on the "x" button or type "sqrt()". This function represents x^.5 where the result squared is equal to x. Raise to the Power
The raise to the power (y raised to the x function) is used by clicking on the "y^x" button or type "^". Natural Exponential
The natural exponential (e raised to the x) is used by clicking on the "e^x" button or type "exp()". The result is e (2.71828...) raised to x. Logarithm
The logarithm (LOG) is used by clicking on the "LOG" button or type "LOG()". Natural Logarithm
The Natural logarithm (LN) is used by clicking on the "LN" button or type "LN()". Inverse
Multiplicative inverse (reciprocal function) is used by pressing the "1/x" button or typing "inv()". This function is the same as x^1 or dividing 1 by the number. Exponent
Numbers with exponents of 10 are displayed with an "e", for example 4.5e+100 or 4.5e100. This function represents 10^x. Numbers are automatically displayed in the format when the number is too large or too small for the display. To enter a number in this format use the exponent key "EEX". To do this enter the mantissa (the non exponent part) then press "EEX"...
...Calculators can perform math functions quickly and easily. The most common functions are addition (+), subtraction (), multiplication (*) and division (/). Press the “=” sign to get the answer. Note that many calculators use different symbols for multiplication (x) and division (÷), and "C" for "Clear"—the erase function.
To use the calculator,
The Simple Virtual Calculator supports the following operations:
• Addition (key '+')
• Subtraction (key '')
• Multiplication (key 'X')
• Division (key '/')
Memory Operation
The calculator has one memory that can be used for storing values temporarily. To clear the memory (set it's value to 0), press the key 'MC'. To recall the value stored in memory use the key 'MR'. To add to the value in memory, press 'M+'. To subtract a value from the memory use the key 'M'.
Turn the calculator on by pressing the "On/C" button. Turn the device off by pushing the "2ndF" button and then "Off."
ON
CE.C clears the last number you entered (‘clear entry’) and turns the calculator on.
AC clears all numbers entered (‘all clear’).
This is what a calculator can look like. However, every calculator is slightly different.
Keys
÷ x + are called operation keys.
0. is the display (for the numbers you have entered
and the answer when you finish).
More function keys
These keys are called advanced...
...In todays time, calculators in schools are just as widely used as computers are. Since its invention nearly forty years ago, the electronic calculator has evolved from a machine that could only perform simple fourfunction operations ( addition, subtraction, multiplication, division) into one that can now also execute highly technical algebraic symbolic manipulations instantly and accurately. Each new generation of calculators builds on the previous one, with heightened speed and more advanced capabilities. At the same time, the cost of a basic calculator has dropped so low that virtually that every household in the U.S. can easily afford one.
Calculators are a big help when doing mathematical equations correctly. They are also a useful tool in learning different ways to do mathematics. The use of them plays a big part in excelling in math. With extensive availability, a full range of sizes and styles, and a price range for just about any budget, there really shouldnt be any excuse for not owning a one. There also shouldnt be any restrictions, as far as Im concerned, for the use of calculators in classrooms. I agree with this rule only when the level of math is above learning the four basic operations. Its not about the tedious math involved thats important, its about learning the fundamentals and concepts of how to problem solve. The advantage of this technology is so helpful for...
...Calculator
Definition of calculator:Pronounce as “cal·cu·la·tor (Noun)” Something used for making mathematical calculations, esp. a small electronic device with a keyboard and a visual display. 


Different kinds of calculator * Basic ScientificCalculators * Advance scientificcalculator * Graphic scientificcalculator * Financial calculator * Other 


 HANDHELD CALCULATOR 

In the early 1970s, the daily lives of people throughout the developed world were changed profoundly by the advent of a small electronic machine that could perform basic mathematical problems much more quickly and more accurately than they could be worked out on paper. Calculators expanded the math capabilities of everyone from high school students to businessmen.The original compact calculator was the abacus, developed in China in the ninth century. The young French mathematician Blaise Pascal (16231662) invented the first adding machine in 1642, a clever device driven by gears and capable of performing mechanical addition and subtraction. The first commercially successful adding machine was developed in 1886 by William Seward Burroughs (18551898). The "Millionaire," a machine invented by Otto Steiger in 1894, was the first adding machine also capable of direct multiplication. 
The...
...Calculators are a way of doing mathematical equations when used correctly. They are also a useful tool in learning mathematics. The use of calculators have only had part in the benefit of education, and with widespread availability, a full range of sizes, and a price range for any budget there should be no excuse not to own a calculator or restrict the use of calculators. Current issues with calculators have to be dealt with in order to better understand the advantage of this technology, which is the intention of this paper. Calculators should be utilized more often not only because current myths block how beneficial calculators really are but also because they create a more efficient student and easily integrated because of size and price.
Current myths about calculators are only slowing the process of the addition of calculators, which are placing students away from the real world where we are already wrapped in technology. Tests have proven calculators are useful for means of learning but because of false information, some educators and others still believe they are harmful. It is imperative that these myths be dealt with so that the truth will be known.
One myth is that calculators are used because the students are too lazy to do the computations while the calculators to do all the work. This is...
...Calculator in the Exam Room
Affordable technology is continually reducing the amount of thinking we need to do in daily life. With the widespread popularity of digital watches, for example, we do not need to know how to tell time anymore. Computers, another thought  saving device, are becoming ever more sophisticated with the advent of artificial intelligence software. Recently, technology has been creeping into the classroom. Increasingly, teachers are allowing the use of calculators in mathematics class even during examinations. Even the Educational Testing Service, publisher of the influential SAT, is bowing to the times. From the beginning of the 19931994 academic year, students have been allowed to use calculators on the SAT.
This trend has dangerous, longterm consequences. In general, students should not be allowed to use calculators during mathematical examinations. While calculators do indeed save time on lengthy or complex calculations, allowing widespread use will corrupt these very tests, lead to a faculty appreciation of exact answers, and contribute to the continuing atrophy of important mathematic skills.
Admittedly, calculators are cheap; a decent one can be purchased for less than a price of a movie ticket. Permitting their use would greatly reduce simple computational errors and allow testmakers to devote more time to important mathematical concepts rather...
...governments of both developed and underdeveloped nations have become increasingly excited about the possibilities of electronic learning to deliver cost effective, easily accessible and ever current education to all ages and social backgrounds, regardless of time and geography.
The advent of computer has brought so many ideas and innovations to every human. This has really helped many businesses to grow and improve up to standard. 2000 years back when the birth of computer came to existence, many scholars has really tried to develop their own computer system, being a calculator or analytical machines. Examples of these scholars include Charles Babbage who is known as the father of computer, Blaise Pascal who developed pascal programming language, Ada Augusta, etc. And Thomas Colmal who was a calculator inventor which is the case study of this project, ie this was based on how a standard and scientificcalculators can be developed with the use of the objectoriented programming language, Microsoft Visual Basic 6.0 by name.
1.1 HISTORY OF COMPUTER
The history of computers starts out about some 2000 years ago, at the birth of the abacus, a wooden rack holding two horizontal wires with beads strung on them. When these beads are moved around, according to programming rules memorized by the users, all regular arithmetic problems can be done. Another important invention around the same time was the Astrolabe, which was...