The - key is for subtraction, an operation that needs two numbers. If you press - as the first key on a line, the calculator assumes you want to subtract something from the previous answer, Ans.
If you want to enter a negative number, use the (-) key on the bottom row of the keyboard, just to the left of the Enter key.
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The - key is for subtraction, an operation that needs two numbers. If you press - as the first key on a line, the calculator assumes you want to subtract something from the previous answer, Ans.
If you want to enter a negative number, use the (-) key on the bottom row of the keyboard, just to the left of the Enter key.