Question about Casio FR-2650Plus Calculator

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Casio fr-2650 plus is showing an E on the screen and not allowing me to input data. Ideas?

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Follow theses steps (from Casio Support) :

First, check the batteries, and ensure there is not a paper jam in the printer.
If both are fine, then while the calculator is in the "Print" mode, press the [CA] (or [AC]) button 20 times consecutively to clear out memory buffers. Try some numerical calculations, and if the problem persists, repeat pressing the [CA] button 20 times.
If the problem still persists, then the calculator may require service

Posted on Sep 28, 2010

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See if the roller gear is jammed or rusted. A little wipe with WD40 may help.

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My Casio FR-2650 Plus isn't printing in the hundreds or thousands place. For example the number 1500.00 looks like 00.00. Can anyone help me?


There is settting for the print setup for this calculator I believe if not then check the print head for build up or blockage

Mar 02, 2011 | Casio FR-2650Plus Calculator

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How do i use this calculator (casio CFX 9850)to find the variance


Part A shows you how to enter your data and calculate some statistical values. Keep in mind that the variance is the square of the standard deviation.

You can safely ignore the PART about REGRESSIONs until that time you need the information.

PART A
In the main menu select [STAT] icon to enter Stat mode and display the statistical data lists. Use the satistical data lists to input data and perform statistical calculations. Use the arrows to move the highlighting around the lists.
Exemple: Enter the following values in List 1
1st line enter 90 [EXE]
2nd line 85 [EXE]
3 79 [EXE]
4 75 [EXE]
5 70 [EXE]
6 68 [EXE]
7 56 [EXE]

When finished you press [F2:Calc], then [F1:1Var] and the statistical results appear on screen.
Title of screen : 1-Variable
x bar =74.7142857
Capital Sigma x= 523
Capita Sigma X squared = 39851
x lower case sigma n = 10.5249945
x lower case sigma n-1= 11.3682934
n = 7
Scroll down with Down arrow to access other data
minX =56
Q1=68
Med =75
Q3=85
Xbar -x lower case sigma n =64.1892911
x bar + x lower case sigma n = 85.2392802
maxX=90
Mod=90

All you have to do now, is to look at the theory you learned and interpret what these values mean.


PART B
  1. Once you enter your data [MENU][STAT],
  2. press [F1:Graph],
  3. select Gph1, Gph2, or Gph3.
  4. Once the graph of the experimental data is drawn, you will have access to the diverse regression models.
  5. Your choices are
  • [X:Linear]
  • [Med-Med],
  • [Quadratic :X^2]
  • [Cubic;X^3]
  • [Quartic: X^2].
  • Press [F6] to scroll right to access the others:
  • [Logarithmic:LOG],
  • [Exponential :EXP],
  • [Power :Pwr] and
  • [Sinusoidal:Sin]
  1. After you select a model and press [EXE], the screen displays the equation and its various coefficients.
  2. On that same screen, you have a menu option [F6:Draw].
  3. If you select it, the regression curve will be drawn on the same screen as your statistical graph.
  4. This allows you to judge if the fit is good. If it is not, you have the option to choose another model.
  5. The other option [F5:Copy] allows you to save the regression equation in the Y1, Y2, etc. variables.

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Don't know how to change the ink?


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FR-2650 Plus adding machine


How to install paper tape on a adding machine?

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Casio fr-2650 plus calculator


SETTING YOUR TAX RATE
you hold your set % button down for three seconds until set shows again, then hit tax rate button it shows your tax rate, change your tax rate then hit set your tax rate should be set.



cliff notes:
hold set% button
hit tax+ button
change the desired % 
hit set done


Do rate the solution.

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1 Answer

Changing Tax calculation


Printing models (except HR-8TE): 1. Have calculator in ?print? mode 2. Press [CA] 3. Hold [SET/%] key for about 3 seconds 4. Input the tax rate 5. Press [TAX+] 6. Press [SET/%]

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How do I replace the ink?


there is a little ink roller in there that should just pop out and then you can snap the new one in.

Jan 04, 2007 | Casio FR-2650Plus Calculator

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