Question about HP 12c Calculator

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Your key sequence is calculating 5*5, which is 25. If you press * again, you will get 50, which is 2*5*5. The second ENTER lifts the 5 into Y, leaving two copies of 5 on the stack, which get multiplied together.

To calculate 2*5, press 2 ENTER 5 * . Note only one ENTER, used to separate numbers.

Posted on Mar 23, 2011

Testimonial: *"thanx!! Yes figured it out after read the manual carefully...but really thanks sooo much :)"*

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Posted on Jan 02, 2017

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To configure the calculator to do fractions, set the Input/Output mode to MathIO.

**Press [SHIFT][MODE] to open (SetUp) then select [1:MathIO]. **

After you set it to MathIO, pressing the fraction key will display a fraction template where you can enter numerator and denominator as you would by hand (horizontal fraction bar). Also, the calculator will display results as fractions and radicals**whenever possible.**

To perform arithmetic operations on fractions use the regular operation keys (x, +, -, /). The calculator will perform the operations and display the results as fractions** (whenever possible).**

After you set it to MathIO, pressing the fraction key will display a fraction template where you can enter numerator and denominator as you would by hand (horizontal fraction bar). Also, the calculator will display results as fractions and radicals

To perform arithmetic operations on fractions use the regular operation keys (x, +, -, /). The calculator will perform the operations and display the results as fractions

Aug 15, 2011 | Casio fx-300ES Calculator

Actually, the answer is 79.

The fx-115ES does not have a key for the modulus operation. Nor does it have an integer-part or fractional-part operation. However, it is possible to calculate the remainder using integer arithmetic.

Press MODE 4 to shift into integer mode. Then type in 3 5 2 - 9 1 * ( 3 5 2 / 9 1 ) = and see the answer 79. It's a pain as both numbers have to be entered twice, but it does get the job done.

To get back to working with real numbers again, press MODE 1 ( or MODE 2 for complex).

The fx-115ES does not have a key for the modulus operation. Nor does it have an integer-part or fractional-part operation. However, it is possible to calculate the remainder using integer arithmetic.

Press MODE 4 to shift into integer mode. Then type in 3 5 2 - 9 1 * ( 3 5 2 / 9 1 ) = and see the answer 79. It's a pain as both numbers have to be entered twice, but it does get the job done.

To get back to working with real numbers again, press MODE 1 ( or MODE 2 for complex).

Feb 26, 2011 | Casio FX-115ES Scientific Calculator

The fx-115ES does not have a modulo operator. However, it is possible to compute the remainder using integer arithmetic. Press MODE 4 to shift into integer mode. Then calculate A modulo B as

A - B * (A / B). For example, to calculate 41 modulo 6, press

4 1 - 6 * ( 4 1 / 6 ) =

and get 5.

Press MODE 1 to return to real arithmetic.

A - B * (A / B). For example, to calculate 41 modulo 6, press

4 1 - 6 * ( 4 1 / 6 ) =

and get 5.

Press MODE 1 to return to real arithmetic.

Feb 07, 2011 | Casio FX-115ES Scientific Calculator

The fx-115ES does not have a modulo operator. However, it is possible to compute the remainder using integer arithmetic. Press MODE 4 to shift into integer mode. Then calculate A modulo B as

A - B * (A / B). For example, to calculate 41 modulo 6, press

4 1 - 6 * ( 4 1 / 6 ) =

and get 5.

Press MODE 1 to return to real arithmetic.

A - B * (A / B). For example, to calculate 41 modulo 6, press

4 1 - 6 * ( 4 1 / 6 ) =

and get 5.

Press MODE 1 to return to real arithmetic.

Dec 07, 2010 | Casio FX-115ES Scientific Calculator

The fx-115ES does not have a modulo operator. However, it is possible to compute the remainder using integer arithmetic. Press MODE 4 to shift into integer mode. Then calculate A modulo B as

A - B * (A / B). For example, to calculate 2 modulo 100, press

2 - 1 0 0 * ( 2/ 1 0 0 ) =

and get 2.

Press MODE 1 to return to real arithmetic.

A - B * (A / B). For example, to calculate 2 modulo 100, press

2 - 1 0 0 * ( 2/ 1 0 0 ) =

and get 2.

Press MODE 1 to return to real arithmetic.

Nov 06, 2010 | Casio FX-115ES Scientific Calculator

The fx-115ES does not have a modulo operator. However, it is possible to compute the remainder using integer arithmetic. Press MODE 4 to shift into integer mode. Then calculate A modulo B as

A - B * (A / B). For example, to calculate 41 modulo 6, press

4 1 - 6 * ( 4 1 / 6 ) =

and get 5.

Press MODE 1 to return to real arithmetic.

A - B * (A / B). For example, to calculate 41 modulo 6, press

4 1 - 6 * ( 4 1 / 6 ) =

and get 5.

Press MODE 1 to return to real arithmetic.

Sep 28, 2010 | Casio FX-115ES Scientific Calculator

The calculator has two Input/Output modes: the default MthIO (new) and the old LineIO.

If you use the default MthIO you can let your calculator perform the operations in exact arithmetic. When you obtain the end result, you can easily convert a fraction/radical result into a decimal one by pressing the [S<=>D] key, or press [SHIFT][=] instead of [=].

However if you do not care about the MthIO and its nifty functionalities, you can configure your calculator to use LineIO.

To set LineIO press [SHIFT][MODE][2:LineIO]

- In MthIO you enter fractions and radicals as you see them in textbook (multiple levels). Calculations are exact and results are generally a mixture of fractions and radicals.
- In LineIO, numbers are entered the old way and all numbers, operations are written on a single line. All fractions and radicals are converted into decimals numbers.

If you use the default MthIO you can let your calculator perform the operations in exact arithmetic. When you obtain the end result, you can easily convert a fraction/radical result into a decimal one by pressing the [S<=>D] key, or press [SHIFT][=] instead of [=].

However if you do not care about the MthIO and its nifty functionalities, you can configure your calculator to use LineIO.

To set LineIO press [SHIFT][MODE][2:LineIO]

Jan 28, 2010 | Casio FX-115ES Scientific Calculator

Hello,

What you are calculating is -1 times 5^2 which is -1*25=-25.

If you want to calculate the square of -5 you enclose it between parentheses.

**Reason**

There are two operations: the power and the negation and the power has priority. Thus 5^2 is calculated first, then its negative is taken.

If you put it inside parentheses, the () has priority. The negative of 5 is taken first, then the result is squared giving 25.

**(-5)^2=25.**

Hope it helps.

What you are calculating is -1 times 5^2 which is -1*25=-25.

If you want to calculate the square of -5 you enclose it between parentheses.

There are two operations: the power and the negation and the power has priority. Thus 5^2 is calculated first, then its negative is taken.

If you put it inside parentheses, the () has priority. The negative of 5 is taken first, then the result is squared giving 25.

Hope it helps.

Oct 21, 2009 | Texas Instruments TI-83 Plus Calculator

Hello,

This calculator uses RPN (reverse polish notation) not algebraic notation.

If say you want to calculate 12+13, you proceed as follows

12 [ENTER] 13 + : the claculator displays 25

Similarly

12 [ENTER] 13 x : displays 156

Also if you use a function like sinus or cosinus

12 [ENTER]**cos** displays the value (depending on the angle unit you are using).

I think you need to read a little more on the RPN before you get accustomed to this way of doing thing. The best reference is your calculator**Getting started manual.**

Hope it helps.

This calculator uses RPN (reverse polish notation) not algebraic notation.

If say you want to calculate 12+13, you proceed as follows

12 [ENTER] 13 + : the claculator displays 25

Similarly

12 [ENTER] 13 x : displays 156

Also if you use a function like sinus or cosinus

12 [ENTER]

I think you need to read a little more on the RPN before you get accustomed to this way of doing thing. The best reference is your calculator

Hope it helps.

Jan 18, 2009 | HP 48gx Calculator

I think what you want to do is not to factor but to expand, which is the option right under factor [F2, 3].
expand((x-5)^2) = x^2-10x+25

Jul 13, 2007 | Texas Instruments TI-89 Calculator

Feb 26, 2015 | HP 12c Calculator

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