Casio Fx 991es User Manual

• Casio Fx-991es Plus User Manual Pdf
• Casio Fx 991es User Manual

Hello, I am only looking for a plausible cause of the error, because I do not believe your calculator can make such a mistake. I think you accidentally activated the Exponential display format and did not pay attention to the small, raised -03 that came at the end of the number displayed. It is a common mistake for those not very familiar with Scientific or exponential notation. Let us try to reset your calculator to the normal (floating point) format. Press the MODE key a number of times until you reach a screen that has FIX, SCI, NORM and under each one a number (FIX 1, SCI 2), Norm 3). To have the number of decimal place you gave in your result (4 decimal digits), you press 1 to select Fix then 4. Be aware that scientific calculators usually stop displaying results in floating point format ( 0.0000045 ) if the number is smaller then 0.001.

Casio Fx-991es Plus User Manual Pdf

Manuals and User Guides for Casio FX-991ES. We have 3 Casio FX-991ES manuals available for free PDF download: User Manual, Appendix, Product Catalogue Casio FX-991ES User Manual (76 pages). View online Operation & user’s manual for Casio FX 115ES - Advanced Scientific Calculator Calculator or simply click Download button to examine the Casio FX 115ES - Advanced Scientific Calculator guidelines offline on your desktop or laptop computer. Casio FX-115ES-S-IH, Casio FX-991ES.

So basically, 0.00099 will be displayed as 9.90-04, -04 being raised above the level, and in smaller size. Hope it helps. Answered on Jan 10, 2018. Hello, When you have a fraction output, press the SD key to convert to decimal, the same key to convert from decimal to fraction. Beware that fraction results are exact, while decimal values are approximate. However if you cannot stand the sight of a fraction, there is a way to get rid of this type of output. Here is how you do it.

All your results will be in decimal. However you will lose a lot of functionalities, such as calculating the logarithm in any base, manipulating radicals. My advice, if you allow, is to activate the SHIFTMODE1:MathIO and press the SD whenever you want a result (be it a fraction or radical) in decimal format. Hope it helps. Answered on May 26, 2017. 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 MODE6: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 ShiftMatrix 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 MatAx-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).

Casio Fx 991es User Manual

As you well know matrix multiplication is not commutative This has to do with the dimensions. An mXnmatrix 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. Answered on Apr 22, 2017.