Texas Instruments TI-83 Calculator Notes

©2007 Key Curriculum Press Discovering Algebra Calculator Notes for the Texas Instruments TI-83 and TI-83/84 Plus 25
Note 1L • Matrices (continued) TI-83 and TI-83/84 Plus
(continued)
Errors
If you get an ERR:MEMORY message, you’ve tried to enter matrix dimensions
that exceed the available memory in the calculator.
An
ERR:UNDEFINED message probably indicates that you have named a matrix
that is not defined.
Note 1M • Multiplying a Matrix by a Number
To multiply a matrix by a number, multiply each cell value of the matrix by the
number. For example, if
[A] is the matrix from Note 1L, to multiply [A] by 50,
enter
50
*
[A] or 50[A] on the Home screen and press . The matrix answer
appears on the screen.
Multiplying a number by a matrix,
[A]
*
50 for example, is done in the same way.
Errors
An ERR:UNDEFINED message probably indicates that you have named a matrix
that is not defined.
Note 1N • Adding/Subtracting Matrices
To add or subtract two matrices, the matrices must have the same dimensions.
Define
[B] to have dimensions 3  2, and enter the values below. (See Note 1L.)
1, 1  8.9 1, 2  9.1
2, 1  2.35 2, 2  2.65
3, 1  1.5 3, 2  1.6
Define
[C] to have dimensions 3  2, and enter the values below.
1, 1  2.5 1, 2  2.25
2, 1  12,2  1.25
3, 1  .65 3, 2  .5
ENTER
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Texas Instruments TI-83 Specifications

General

Programming	TI-BASIC
Processor	Zilog Z80, 6 MHz
Weight	7.4 oz (210 g)
Display	96x64 pixels, monochrome LCD
Power Source	4 AAA batteries, 1 CR1616 or CR1620 for backup
Memory	32 KB RAM
Connectivity	2.5mm I/O port for linking with other TI calculators