BASIC OPERATIONS
USING TI-83:
Find the Greatest Common Factor
of 180 and 315
Go through the 6 steps, skipping the
comments in red. Once you understand
how to perform the GCF operation,
come back to study the comments.
B. Fofana, Middle College HS
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Step 1
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Step 2
Press Right Arrow to select NUM :
the resulting screen appears on the next slide
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Step 3
Press the Down Arrow until item 9 ³ gcd(³ is highlighted.
Next slide shows result.
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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 HS
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