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The sign change key on the TI-83 Plus calculator is located on the bottom row of keys to the left of the ENTER key.

It is a white key with black printing that looks like this: (-)

You must use this key instead of the blue subtraction key when you need to indicate a negative number; otherwise, the calculator will tell you it doesn't understand what you mean ("syntax error").

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Q: Where is the change sign key on the TI-83 plus calculator?
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