There is a key with a "+" sign, 2 arrows and a "-" sign. After you enter a number, hit this key to change it's sign. Hope this helps. Good luck!
Next to the equal sign on your left there is a sign that first has a +, two arrows, and a subtract sign.
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There is a key with a "+" sign, 2 arrows and a "-" sign. After you enter a number, hit this key to change it's sign. Hope this helps. Good luck!
Next to the equal sign on your left there is a sign that first has a +, two arrows, and a subtract sign.