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# My casio DM-1200V calculator adds a zero on the input number of which these numbers stop on five.trying to input any number beyond 5 doesn't work.like when you put 2 it displays 20, 4-40 like that.

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Posted on Jan 02, 2017

Enter 1 then press the (SIGMA)+ button (SIGMA) looks like a sideways capital M ....its a Greek letter.

Then enter 2 and press the (SIGMA)+ button
Then enter the next value and press the (SIGMA)+ button

After you press the (SIGMA)+ button the calculator displays the number of numbers you have entered

Once all numbers of your sample have been entered press 2nd and the button corresponding to x-bar

sample st. dev is the (sigma)n-1 button (need to use 2nd button)
variance is (std. dev.)^2

population st. dev is the (sigma)n-1 button (need to use 2nd button)
variance is (std. dev.)^2

Posted on Mar 12, 2008

SOURCE: Casio DF-120TE

Press "AC", then press "M/EX" above the "AC" to get out of Ci EXCH function.

Posted on Aug 13, 2008

Unless I am failing to understand your problem, just combine like terms to get:
9x^2+2x+4 and then enter those coefficients into the quadratic solver.
That will get you the two answers -- both of them will be complex.
If you wanted to turn those two answers into factors (complex) of the original equation simply
change the signs on each and put an x in front.
Of course, the quadratic formula would also work.
CG

Posted on Apr 28, 2009

Unfortunately, I found there is no "solution." I called Casio and was told that there is no way to change that format on this model.

Posted on Jun 16, 2009

SOURCE: m mod n in Casio fx991MS

there is one button ab/c beneath CALC... if u want to calculate 7 mod 4 then... u should press 7 then ab/c 4 and equal to
1, 3 ,4 which is 4*1=4 and 7-4=3 remainder...

Posted on Jun 29, 2009

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## Related Questions:

### I can't get rid of the zero in front of the minus, add, multiply and devide sign. how do i get rid of it?

Are you entering any number before pressing the minus, add, multiply, or divide key? Those operations require two numbers; if you don't supply the first one then the calculator will supply the previous answer, which was zero.

For example, to add 2 and 3, press 2 + 3 = and you'll see 5. Now to add 4 to that, press + and the calculator will automatically supply the 5. Press 4 = and you'll see 9.

Oct 08, 2013 | Sharp el-531x scientific calculator

### Negative number for tangent

If you're getting -3.38 then you've just computed the tangent of 5 radians. If you want to do calculations in degrees then change the calculator's angular mode to degrees.

Oct 07, 2012 | Casio FX-300W Plus Calculator

### Casio calculator fx115es inverse key not working consistently

The inverse sine is defined only for numbers in the range [-1, +1].
The sine of a number is at most 1.0. There is no number whose sine is 1.5, which is what you're asking for.
The same applies to the cosine and inverse cosine.

Oct 24, 2011 | Casio FX-115ES Scientific Calculator

### Hi there, I have a Casio fx-991ES, and my calculator doesn't seem to be converting decimals in surd form... i.e. 0.3354101966 was the last number I typed in that didn't work... That, in surd...

The calculator can't identify that this is a surd unless you input it as a surd, ie as 3/(4*sqrt(5))= when it will then show the equivalent form 3*sqrt(5)/20 (obtained by multiplying top and bottom by sqrt(5)) and you can swap between the two forms using the S<>D button. Even adding the next 4 decimal places (hidden) won't allow the calculator to identify the underlying surd as this is simply too complcated a calculation.

Jun 08, 2011 | Casio FX-115ES Scientific Calculator

### How do I generate a random number that is greater than 1 on a casio fx-300MS

The random number function always generates a number between zero and one. You can convert this to a random number in any range by a suitable combination of multiplications and additions. For example, if you want a random number between zero and ten, multiply the generated random number by 10. If you want a random number between one and ten, multiply the generated random number by 9 and then add 1.

If you want to simulate the roll of a six-sided die, multiply the generated random number by 6, add 1, and ignore the fractional portion. This will give you a 1, 2, 3, 4, 5, or 6 with more-or-less equal probability.

Mar 10, 2011 | Casio FX-300MS Calculator

### My calculator casio fx 350ES doesnt give me right anwser.this is the anwser from my calculator when i inter this numbers 220 000-100 000=120 (there should be 3 more zeros).it happens all the time when i...

Did you enter a dot as a separator for the thousands? If yes, this is the error. The calculator interprets all digits following the dot as fractions of decimals.
So you enter 220.000 meaning 220 thousand, your calculator gets it as 220 comma 0, and thats where your three zeros go...

To make it right, enter your numbers as 220000 - 100000 and you'll get 120000 as result.

Jan 10, 2011 | Casio FX-115ES Scientific Calculator

### In casio fx-991ES, i am able not to get the matrix multiplication as well as inverse when i do so get math error.

This post is rather exhaustive as regards the matrix capabilities of the calculator. So if the post recalls things you already know, please skip them. Matrix multiplication is at the end.

Let me explain how to create matrices. (If you know how to do it, skip to the operations on matrices, at the end.)

First you must set Matrix calculation
[MODE][6:Matrix]. Then By entering one of the numbers [1:MatA] or [2:Matb] or [3:MatC] you get to choose the dimensions of the matrix
(mxn]. Once finished entering the matrix you clear the screen.
The operations on matrices are available by pressing [Shift][Matrix]
[1:Dim] to change the dimension of a matrix (in fact redefining the matrix)
[2:Data] enter values in a matrix
[3:MatA] access Matrix A
[4:Matb] access Matrix B
[5:MatC] access matrix C
[6:MatAns] access the Answer Matrix (the last matrix calculated)
[7:det] Calculate the determinant of a matrix already defined
[8:Trn] The transpose of a matrix already defined

To add matrices MatA+MatB (MUST have identical dimensions same m and same n, m and n do not have to be the same)
To subtract MatA-MatB. (MUST have identical dimensions, see above)
To multiply MatAxMatB (See below for conditions on dimensions)
To raise a matrix to a power 2 [x2], cube [x3]
To obtain inverse of a SQUARE MatA already defined MatA[x-1]. The key [x-1] is the x to the power -1 key. If the determinant of a matrix is zero, the matrix is singular and its inverse does not exit.

Dimensions of matrices involved in operations must match. Here is a short summary

The multiplication of structured mathematical entities (vectors, complex numbers, matrices, etc.) is different from the multiplication of unstructured (scalar) mathematical entities (regular numbers). As you well know matrix multiplication is not commutative> This has to do with the dimensions.

An mXn matrix has m rows and n columns. To perform multiplication of an kXl matrix by an mXn matrix you multiply each element in one row of the first matrix by a specific element in a column of the second matrix. This imposes a condition, namely that the number of columns of the first matrix be equal to the number of rows of the second.
Thus, to be able to multiply a kXl matrix by am mXn matrix, the number of columns of the first (l) must be equal to the number of rows of the second (m).

So MatA(kXl) * MatB(mXn) is possible only if l=m
MatA(kX3) * Mat(3Xn) is possible and meaningful, but
Mat(kX3) * Mat(nX3) may not be possible.

To get back to your calculation, make sure that the number of columns of the first matrix is equal to the number of rows of the second. If this condition is not satisfied, the calculator returns a dimension error. The order of the matrices in the multiplication is, shall we say, vital.

Dec 18, 2010 | Casio FX-115ES Scientific Calculator

### I can't plug in "i" on my casio fx-115ES even when

By default the calculator only works with real numbers. To use complex numbers, press MODE 2 to switch to complex mode.

Dec 13, 2010 | Casio FX-115ES Scientific Calculator

### Tax Rate change on calculator

1. Press [AC]
2. Hold [SET/%] key for about 2 seconds
3. Press [TAX+]
4. Input the tax rate
5. Press [SET/%]

Otherwise, see the Casio's FAQ page
http://www.casio.com/support/techsupport/08B88781-94BF-4C2F-A867-7E5AF85AC461

Apr 05, 2009 | Casio DM-1200TE Calculator

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