# B. Fofana, Middle College HS1 OPERATIONS ON MATRICES USING TI-83 Objective : 1.How to create and save a matrix 2.How to add two matrices 3.How to multiply.

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B. Fofana, Middle College HS1 OPERATIONS ON MATRICES USING TI-83 Objective : 1.How to create and save a matrix 2.How to add two matrices 3.How to multiply a scalar by a matrix 4.How to multiply two matrices 5.How to determine the inverse of a matrix It is assumed that you are familiar with the above operations ; if not, please click here to review the relevant concepts First, a warm-up : Find the GCF of 180 and 315here

B. Fofana, Middle College HS2 0. DO NOW Find the GCF of 180 and 315, using TI-83 Step 1

B. Fofana, Middle College HS3 Step 2 Press Right Arrow to select NUM : the resulting screen appears on the next slide

B. Fofana, Middle College HS4 Step 3 Press the Down Arrow until item 9 : gcd( is highlighted next slide shows result

B. Fofana, Middle College HS5 Step 4 – Step 6 ( The resulting screen, at each step, can be seen on the right panel ) Step 4 Press 9 on keyboard (this is the shortcut for highlighting gcd( and pressing ENTER ) Step 5 Type 180, 315 after the open parenthesis and close it Step 6 Press ENTER : result = 45

B. Fofana, Middle College HS6 1. How to create and save 3-by-4 matrix A

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