Casio ClassPad 330 User Manual page 151

(3) Tap 8 , and then input the values for the second matrix.
(4) Tap w .
Example 3: To multiply the matrix
u ClassPad Operation
(1) Perform the key operation below in the Main application work area.
9[[b,c][d,e]]*f
(2) Tap w .
Tip
• Note that when adding or subtracting two matrices, they both must have the same number
of rows and the same number of columns (the same dimensions). An error occurs (Invalid
Dimension Error) when the two matrices have different dimensions.
• When multiplying two matrices, the number of columns in the matrix to the left of the multiplication
sign (×) must be the same as the number of rows in the matrix to the right of the multiplication
sign. An error occurs (Invalid Dimension Error) when you attempt to multiply two matrices that do
not satisfy the above conditions.
• Multiplication is assumed if you do not include any operator between two matrices.
[[1, 2] [3, 4]] [[2, 2] [2, 2]] for example, is treated as [[1, 2] [3, 4]] × [[2, 2] [2, 2]].
2-6-5
Matrix and Vector Calculations
1 2
by 5
3 4
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