Table of Contents

## How do I reset my Casio FX-991ES calculator?

How to reset Casio fx-991ES or fx-82ES?

- Turn the calculator on with the ON button. There is no hardware reset button on the back.
- SHIFT 9 to enter Reset.
- 3 to select the Reset All option.
- = to confirm the reset.
- AC to return to normal calculation, or SHIFT AC to turn the calculator off.

### What is the difference between FX 991MS and FX-991ES?

The Casio fx-991ES PLUS has better features as compared to the 991MS, but there is one downside: you cannot input and display engineering symbols (SI prefixes) like μ (micro), m (milli), K (kilo) etc. in the ES PLUS, but you can do so in the MS.

#### Is Casio FX 991MS allowed in exams?

Yes. Both MS and ES are allowed. Certainly FX 991ES and FX 991MS both are allowed in conventional paper of Engineering Services Examination.

**How do I know if my Casio FX 991MS is real?**

How to check the authenticity of the calculator via installed QR

- Display the QR code on the calculator.
- Read the QR code with a smartphone or tablet.
- Manual of ClassWiz will be displayed.
- Click on “Worldwide Education Website” to register your product information.

**How do I fix normal mode on my calculator?**

Users can switch the calculator’s mode using the keypad.

- Locate the “Mode” key on the calculator. Video of the Day.
- Press the “Mode” key repeatedly until a menu with “Fix” “Sci” and “Norm” appear on the screen. Each listing has a number underneath.

## Is Casio FX 991ES plus allowed in exams?

Yes, Casio FX 991ES plus is allowed in the exam as it is a non-programmable scientific calculator.

### Which is better ES or MS?

For Electronics – use the ES model. Both are good and differ very slightly. The MS model is for Statistical calculations mainly and does not support complex numbers. The ES model will be helpful if you’ll use it for Electronics because it has complex number support.

#### How do I know if my Casio 991es Plus is real?

if you want to find Original Casio fx-991ex then just follow the instruction below :

- Pressing Along with [ (SHIFT)+(ON)+KEY(7) ], You Get “DIAGNOSTIC” Mode.
- Then Press KEY (8) within 5 Second you get This Feature.
- After Pressing those KEY You get This Future.

**What is the difference between 991ms and fx-991es plus?**

•FX-991ES plus has a natural textbook display which makes calculations easy to understand. 991MS has a 2 line display whereas 991ES plus has a much wider display •991ES plus has 417 functions whereas 991MS has 401 functions. I find table function (calculating F (x) and G (x) from x) quite useful. This function is not present in 991MS

**Which is better Casio 991 or 991es plus?**

The 991es plus calculator has 417 functions compared to 401 of the 991 ms. The temporary formula memory (calc key) in the 991 es is also extremely helpful in the middle of exams. The ability to work upon complex numbers is also an amazing plus point. As for the performance and longevity you can never doubt Casio.

## Is the Casio fx991ms a scientific calculator?

Both Casio fx991ms and fx- 991es plus are scientific calculator. But to be honest, I would prefer the fx-992es plus rather than the fx991ms. Because using the fx-991es plus is convenient and it is the fastest scientific calculator. It has QR code for equation visualization and also a high resolution LCD screen.

### What is the resolution of the display in the 991es?

2. 991ES has ‘dot matrix display’ with resolution 31×96 pixels. Being dot matrix, the display is programmable. You can enter expression the way you like.