How to open the matrix edit window.
1. Press the 
key.
2. Press the
key, then press
. After pressing the
key the EDIT in the top right hand corner
will be
highlighted.
3. Now, press the 
key and the matrix edit
screen will appear.
Entering Matrices in the Calculator.
4. First, we have to enter the dimensions of the matrix
(row× column). The dimensions of the matrix are located on the
top right hand corner of the screen.
5. Entering the dimensions of Matrix A.
a. Press the 
key,
because the row dimension is 2.
b. Next, press the 
key, this moves the
cursor over to the
column dimension.
c. Press the key for the column’s dimension.
d. Next press the ,
and the rectangular cursor moves to
the first matrix element position.
6. Entering the elements for Matrix A.
a. First, Press the key and a 2 will appear
in the first position of the
matrix.
b. Second, press the
key, the cursor will move right to
the first position in the second column.
c. Now, press the key.
d. Next, press the
key and the cursor will move to the
second row.
e. Next, press
.
f. Press 
, now the matrix is entered into the
calculator and your screen should look like the diagram .
g. So, press the 
key, then press
key. (This will save the matrix
and return you to a blank screen.)
7. Entering the dimensions and elements for Matrix B.
a. Press the key.
b. Next, press the 
key, and the number 2
should be
highlighted .
c. Next, press the
key, and the EDIT will be highlighted.
d. Press and screen
similar to step four will appear.
e. Next, repeat steps 4 to 5d, except fill in the numbers for
Matrix B. After completing step 5, enter in the elements for matrix B
(similar to number 6).
f. Now, press the key,
then the key (this
will clear your screen).
Using Math Functions with Matrices.
_ Note – In order to use the fol lowing math functions, the dimensions must be
appropriate. Each of the following functions will create a new matrix;
the original matrix remains the same.
8. Adding Matrices
a. To add (+) Matrices, the dimensions must be the same.
b. To add Matrix A and Matrix B.
c. Press (to
select Matrix A) 
(to
select Matrix B) .
d. Then, press the
key to add the matrices. Your
screen should look similar to the diagram.
Therefore, Matrix A + Matrix
9. Subtracting Matrices
a. To subtract (-) matrices, the dimensions must be the same.
b. To subtract Matrix B from Matrix A.
c. Press
(to select Matrix A) 
(to select Matrix
B) .
d. Then, press the
key to subtract Matrix B from Matrix A
and, your screen should look similar to the diagram.
Therefore, Matrix A – Matrix
10. Multiplying Matrices
a. To multiply (× ) two matrices together, the column dimension of Matrix
A must match the row dimension of Matrix B.
b. To multiply Matrix A and Matrix B.
c. Press
(to select Matrix A) 
(to
select Matrix B) .
d. Then, press the
key to multiply Matrix A and Matrix
B, and your screen should look similar to the diagram.
Therefore, Matrix A × Matrix
11. To find an Inverse of a Matrix
a. To find the inverse of Matrix A.
b. Press 
and, your screen should
look similar to the diagram.
Therefore, the inverse of Matrix
Written by Tiffany Angstadt, Kutztown University, 2001
1. A + B =
2. C + D =
3. B – A =
4. C – D =
5. A + C =
6. A × B =
7. C × D =
8. B × D =
9. D-1 =
