Question about Casio FX-300MS Calculator

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Hi there!! I want to switch off from fix and reg mode in my calculator...can anyone tells me how to do that??? Thanks in advance

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Change to COMP mode.
[MODE] 1 to exit the REGression mode
Use [MODE] 2 (Sci) or [MODE] 3 (Norm) then 1 for Norm1, or 2 for Norm2. But you may not like them (exponents of 10).
If as I suspect, you just do not want the FIX to appear on the display (in a place where you cannot do anything anyway), if FIX disappears, another mode will appear. It is a reminder about the mode you are using. Learn to accept it.

Hope you are not too disappointed.

Posted on Sep 25, 2009


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I purchased a casio fx-115 ES calcullator. When I use it to calculate total resistance of a parrallel circuit, I use the formula: 1 over the sum of the reciprical of resistances in the circuit. When I...

There seems to be two completely different issues here.

By default the calculator will try to show a symbolic result. 1 divided by 120 is 1 over 120, after all. If you don't want to see fractions at all, press SHIFT MODE 2 to switch to the LineIO mode.

The other is the display mode. 1/120 is about 0.0083. Again, by default, the calculator automatically switches to scientific notation for numbers whose magnitude is less than .01, so it shows the number as 8.3x10-3. To change this, you have two choices. Press SHIFT MODE 6 to select the fixed decimal mode, and the calculator will prompt for the number of digits to the right of the decimal. Alternatively, press SHIFT MODE 8 2 to select the Norm2 mode. This won't switch to scientific notation until the magnitude of the number drops below 10-9.

Calculators only have two choices when a number gets close to zero. It can either round it off to zero, or switch to scientific notation. It doesn't matter how many digits the calculator can display, at some point it has to make the choice.

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How to get mod on it

If you are thinkink of the modulo function, usually shortened to mod(, I am sorry to say it but that function does not exist on the calculator.
However, there is MODE button that one uses to set the operation mode of the calculator.
You have three principal mode setting
COMP: the general computational mode
SD: a statistics mode to calculate Standard Deviations
REG: to perform REGression analyses on statitical data.

Once you have chosen the preferred calculator mode (COMP, SD, or REG) other choices (dependent on the main calculator mode) will be available.


May 03, 2010 | Casio fx-300ES Calculator

1 Answer

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My Sharp El-573 calculator is in scientific mode and nothing I do will put it back in regular arithmetic mode. Please tell me how to switch it back. Thanks for any help! Barbara

Dec 20, 2009 | Sharp Office Equipment & Supplies

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What is the process (key strokes) to set the fx-300ES to decimal mode as the default rather than fraction mode? I know I can use the S-D key to switch between modes but would rather not have to switch.

Don't worry, I will not tell you what you already know. To set the decimal display mode as the default, press [SHIFT][MODE] (Setup) and press [2:LineIO]. If you lose some functionalities of the calculator, you know what to blame.

Hope it helps.
Thank You for using FixYa.
Don't forget to rate the solution.

Nov 28, 2009 | Casio fx-300ES Calculator

1 Answer

I can't differentiate a function and I'm quite

Clearly the x variable stores value zero. Press [F6] ( 1:clear a-z) [ENTER] and restart your derivative.
Hope it helps.

Sep 29, 2009 | Texas Instruments TI-89 Calculator

1 Answer


The [MODE] key can be used to select the modes described below.
Important! The following is a general explanation of Scientific Calculator modes. Note that your calculator may not include all of the modes described here.
1) Calculation Modes
Before performing a calculation, you first need to select the appropriate calculation mode.
COMP: Basic arithmetric calculations
(arithmetic operations, trigonometric functions, etc.)
COMPLEX: Complex number calculations
SD: Single-variable statistical calculations
(sample standard deviation, etc.)
LR or REG: Paired-variable statistical calculations
(linear regression statistical calculations, etc.)
BASE or BASE-n: Binary, octal, decimal, hexadecimal number system calculations
MAT: Matrix calculations (determinants, etc.)
VCT: Vector calculations
EQU: nth degree equations, simultaneous equations
2) Display Settings
Use these settings to control how calculation results are displayed.
Note that changing the Fix and Sci settings does not affect internal calculation results.
Norm: Exponential display format and cancels the currently configured Fix and Sci settings.
Fix: Specifies a fixed number of digits to the right of the decimal place.
Sci: Specifies a fixed number of significant digits.
3) Angle Unit Setting
(90°=?/2 radians=100 grads)
Deg: Degrees
Rad: Radians
Gra: Grads
4) Engineering Mode
Use this mode when you want to input and perform calculations using engineering symbols.

Please rate this response . .

Sep 08, 2009 | Casio MS-80TV Scientific Calculator

1 Answer

How to switch off the REG and Sci function

press MODE then select CALC then COMP to remove REG.
press MODE again select DISP then NORM1 to remove SCI.

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Sharp xe-a41s cash register mode switch stuck

Sounds like you have the wrong key. Look at the letters on the key tab. OP stands for OPerator; it can only move from Off to Reg. MA stands for MAnager; it can move to all the marked positions. Some models also have an SM (Sub-Manager) key that moves from PGM1 to X1/Z1.

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