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Calculators
A calculator is a hand-held inexpensive electronic device used to perform the operations of arithmetic. The simplest calculators can only do addition, subtraction, multiplication, and division, while scientific calculators can handle exponential operations, and trigonometric and logarithmic functions.
1,648 Questions
Why does a scientific calculator sometimes have a different answer than a regular calculator?
They actually don't. It is sometimes just the way they display the results. If you have formulas that end up creating results with decimal points, the spreadsheet might round them up. So something like 23.729999 that you might see on a calculator will show as 23.73 in a spreadsheet when it has been set to only show 2 decimal places. It still actually retains the true value, but displays it differently.
Another reason may be the way that you are doing some calculations. Without seeing what you are doing, it is hard to know. Spreadsheets calculate longer formulas than calculators do and calculators do them in a step by step process, sometimes in a different way. If you wanted to do 10+2*5 on a spreadsheet and a calculator you may get different answers, depending on how you do it. First, looking at it you are probably thinking the answer is 60. You would enter it into a spreadsheet like this:
=10+2*5
The answer you will get is 20, not 60. Using the laws of mathematics, the multiplication is done before the addition, so 2 multiplied by 5 is 10, plus 10 is 20. 20 is the correct answer. If you put 10 + 2 into a calculator and pressed the equals sign, you would get 12. If you then pressed * and 5 and the equals sign, it will give you 60. That is because you've broken the calculation into two steps. Depending on the way your calculator is set up, if you only do the last equals, you may get 20 too. To get the spreadsheet to give you 60, you type the formula like this:
=(10+2)*5
Some calculator have keys with ( and ) on them, which can be used for the same effect. So there are some reasons why you get a different result on a spreadsheet than you do on a calculator. It can be the way it is displaying the result or the way you do the calculation.
ACCOUNTING MODE
Another reason Excel may give you a different answer than your calculator is if you are doing accounting -- and you have your calculator in a common accounting mode where all answers are rounded off and displayed with 2 decimal places. In this mode, your calculator will actually round off each intermediate calculation. From an accounting perspective, this gives you intermediate results that can be shown in dollars and cents -- and the final result correctly matches these intermediate numbers.
This difference doesn't cause a problem if you are adding and subtracting dollars and cents -- or multiplying with whole numbers. However, if you multiply decimals or divide, then you can end up with a different result, often by a few cents.
For example, if you are calculating a daily interest accrual and multiplying by the number of days, you would have a calculation like this:
$50,128.45 x 5.15% / 365 days x 30 days = ??
Your calculator will multiply the first 2 numbers and round off the answer to 2581.62. Then, you type in 365, hit "/" and get the next result rounded off again to be $7.07 of daily interest. Multiply this by 30 and get $212.10.
Excel would calculate this to be $212.19 because it did not round off the intermediate results.
If you change your calculator to the floating decimal mode instead of the 2 decimal places (e.g. slide the switch from "2" to "F"), then you should get the same answer as Excel.
To get the calculator's accounting mode answer in Excel you would have to write the formula to round off each intermediate calculation, like this:
=round(round(50128.45*0.015,2)/365,2)*30
How do you find square root of a number with using calculator?
Estimate, then narrow the range. For example, if you want to find the sqrt of 13, you know it's between 3 and 4. Try 3.5 - it's too low, so now try halfway between 3.5 and 4, 3.75 - it's too high. Now try a number between 3.5 and 3.75, say 3.6. It's just a bit low, so try 3.61, which is a bit high. Continue until your result is as close to 13 as you want.
It's better to get a scientific calculator if you need to do math like this.
What kind of electrical energy does a calculator use?
most calculators are powered by solar energy but some are powered by batteries
Should kids under sixteen use a calculator?
Every kid (including adults) should be able to use a calculater.
When was the first electronic calculator invented?
Texas Instruments of
The First Commercial totally electronic calculator was made by Bell/ Punch Sumlock in the UNITED KINGDOM in 1961. It was called the Anita ( Mk 7 and 8) and was the only electronic calculator on the market untill 1964 when Friden in the USA and Sanyo in Japan launches their own calculators. NO it wasnt Texas instruments or some Japanese electronics giant it was a small English Firm situated in Brighton that started the electronics revolution. Sumlock continued to make calculators untill 1974 when Rockwell bought them out and closed them down.
PLease get your history right the electronic calculator was first made in ENGLAND.
Why would i need to use an online payroll deduction calculator?
To use a payroll deduction calculator you first have to know how many hours a person has worked and then you can figure out how much he or she will be paid. You need to add up the hours worked and then multiply them by the rate of pay the person earns and that is how you will get to know how much he or she will get paid.
Where is the percent key on a scientific calculator?
To use it follow this. For example, if you want 100 minus 30%
You would put:
1 0 0 X 3 0 % -
If you want 100 plus 30%
1 0 0 X 3 0 % +
Which is the best free movie download engine?
uTorrent is arguably the best free movie download engine. It is important to note, however, that downloading copyrighted material is illegal, so make sure any movies you download are not copyrighted.
Why were improvements made on calculators?
Would you like looking through long lists of roots, or using a cumbersome way of finding them? Would you like to spend hours looking at log tables? Can you use a slide rule?
That is why calculators were made.
OR
The "original calculator" is called the abacus and was invented in 2nd century china. It was developed in order to assist with calculations and to improve overall speed. The thing is that the abacus was invented before written language was, and as such was used in place of what we would typically use, paper.
Where to find apps on a ti-84 plus?
Press the APPS button. You will see a list of all the applications that are currently on the TI-84 plus. Use the arrow keys to scroll down to the one you want to use and then press ENTER.
When did the calculator first become available at an affordable price?
The calculator first came at an affordable price of $21.00 in 1952
What is a handicap game in bowling?
If, for example, your league is based off a 200 handicap system, your handicap is worked out accordingly:
(200 - Average) x 80% = hanidcap.
For example, an average of 190:
(200 - 190) x 80% = 8
If your league is off a 210 handicap system, just replace the 200 with 210 in the formula.
It depends on who authorizes the handicap. The authority assigning the handicap also stipulates how it will be calculated. A common calculation that I've encountered is a percentage of the difference between a bowler's average & a target score, e.g. 90% of the difference between the bowler's average & 270.
In Bowling:
To determine handicap you must first know your average. Take total number of games bowled and add the scores together. Then Divide by the total number of games bowled. For instance. Take the scores from three games of bowling and add them together. Then divide by three. This is your average bowling score (184 + 199 + 172 = 555. 555 / 3 = 185. Your average is 185).
Handicap Percentage is set in the bylaws of the league you joined. If you are unsure, ask your league secretary. The typical is 90% of 210/200. The number 210 represents the average game score across the league.
Take the average game score and subtract your average. Then multiply that number by the handicap percentage and you get your individual handicap. For example, if we take our average of 185 and subtract it from 210 we get 25. 90% of 25 is 22.5 or 23 pins of handicap (210 - 185 = 25. 90% of 25 or 0.9 x 25 = 22.5 which we round up to 23).
How do you put games on a calculator?
Here is a great site that will tell you everything you know about graphing calculator programming, and its got programs there to! See the related link, "Graphing Calculator Programming".
How do you work out factor using a calculator?
you divide the number, say the number was 350 and you were seeing if 3 was a factor of it, you would input 350 divided by three and the answer would be 116.666666... so no 350 is not divisible by 3 basically you have to divide it on a calculator and to be divisible it has to be a whole number. hope it helps.
Show how to use a cash register?
Check to see that the cash register has a tape. This will be the receipt that you will give to the customer and provide a record of sale for you. 1 Step2 Make sure the cash register drawer is ready. The cash register drawer is where the money is kept. There is a place for change and bills and usually you will store large bills and credit card receipts under the drawer.
2 Step3 Scan the products when a customer comes up to you. Each item a customer wants to buy has to be scanned by the cash register. This includes the inventory number and the price of the product.
3 Step4 Hit total on the cash register. After all the products are scanned you hit the total button and it will be displayed on the cash register. Inform the customer the amount of money he owes.
4 Step5 Enter the amount of money the customer hands you into the cash register and it will automatically tell you the change you must give to the customer. For example, if the customer owes $15 and gives you $20 the cash register will do the math and tell you to give the customer $5 back.
5 Step6 Accept credit cards as payment. If a customer pays by credit card instead of cash, there is a machine that they will use to make the transaction. The receipt will have this information on it. The copy the customer signs is the copy you will place in the cash register in lieu of money.
6 Step7 Complete the sale by giving the receipt to the customer. You have now learned to use the cash register.
How do you turn off a scientific calculator?
Try this guide: http://www.wikihow.com/Turn-off-a-Normal-School-Calculator
You just press the off button. Or it will just turn off by itself
Press shift then ac
Who invented the first recorded mechanical calculator?
By Tommy ,Fee Flowersand other British scientists developed "Keluosasi" computer
Who invented the first handheld calculator?
The Curta calculator was the first handheld calculator. It was invented during WW2 by a prisoner in a Nazi concentration camp named Curta. The first model was intended as a gift for Hitler, but the war ended too soon
Curta's were produced from about 1947 to 1976, when electronic handheld calculators killed Curta's market.
When was the 1st mobile phone invented?
According to historical records, the first mobile phone was invented by Ericsson in Sweden in the year 1956. The device came to be known as the Mobile Telephone System. The phonewas easy to use since it was automatic but its biggest downside was that it weighed about 40 kilograms. Later in 1965, an upgraded version was launched by the company in order to convince the consumers which became very successful between 1965 to1983 since many bought it as it was only 9 kilograms. Leonid Kupriyanovich, a radio engineer in Moscow, Russia developed an automatic mobile phone known as LK-1 in 1957. A year after, Russia also developed and introduced Altay service, which could be used by mobile phone users while driving. Russians continued to use the service until 1970.
Why was the calculator invented?
To carry out long complicated calculations that the human mind might not be able to perform, and as a result, to also save time.
What words can you spell out on a calculator?
The simplified "figure 8" layout of LCD and LED displays can make numbers appear as letters when inverted (upside-down)*.
Number-letter pairs (some the same inverted or not)
- The number 0 is "O" (either way)
- The number 1 is "I" (either way)
- The number 5 is "S" (either way)
- The number 3 is "E" (inverted)
- The number 4 is "h" (inverted)
- The number 7 is "L" (inverted)
- The number 9 is "b" (inverted)
So any words that can be spelled with B, E, H, I, L, O, or S can be formed by inverted numbers. Example : the number "710 77345" appears inverted as "Shell Oil".
*This scheme obviously preceded text keyboards on calculators and phone devices.
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If you have a modern scientific calculator, there is no need to turn the screen.
If you have a casio FX83ES, use alpha or shift. look at the buttons and you'll see red and yellow letters. You can also make faces. Here is a list of charcaters you can use:
A B C D e X Y M : ( ) -
Here is one of the things you can do
(-:)
using shift, there are eyeballs, and a flashing arrow used for hair, beards, moustaches, etc.
Why did blaise pascal invented the calculator in 1645?
Pascal's triangle was originally devised as a means of determining binomial coefficients: when calculating (x+y)^n, Pascal's triangle is a very convenient way to find the coefficients of the result. Go to the xth row of Pascal's triangle, and use the numbers as coefficients for each term. E.g., (x+y)^4 would be found on the 4th row, the coefficients 1-4-6-4-1. Thus (x+y)^4 = 1(x^4) + 4(x^3)y + 6(xy)^2 + 4x(y^3) + 1(y^4). Pascal later discovered the triangle's use for determining probabilities as well, and mathematicians since have found myriad other uses for it.
How do you use a graphing calculator?
go to youtube.com and type same question in it's search box you will get your answer
