CASIO GAUSS & GAUSS-JORDAN ELIMINATION

      Although one can solve a system of equations using the EQUA function, the CFX-9850 Plus will not do ref and it will not display a matrix in ref or rref format.  Since students in classes such as college algebra often have the TI-83 which does ref and rref,  this program was designed to give the Casio CFX-9850 Plus the capability to convert a matrix to  ref (row-echelon form) or  rref (reduced row-echelon form)  using a format similar to the TI-83.  This program, REFRREF1,  must have the Casio program ROWREDA activated in order to do rref.  To activate that program do this:  Go to the PRGM Icon and press EXE; Press F6; then F5; scroll down to U.S.A and press EXE; scroll down to ROWREDA and press EXE.   The program will now be loaded. 

Running the Program:  Unlike several of my other programs, the student does not participate in this program other than to enter the matrix in position A and select either rref or ref.  As usual when entering a new matrix, I recommend entering each number anew rather than just replacing the changes in the previous matrix.
Memory used and entry time:  This program uses 311 bytes of memory and 243 bytes are required for ROWREDA.  I estimate that an inexperienced programmer can enter it in 10 to 15 minutes.