Yes. For Example 4--4 would be 8 because you are in theory just adding. Just imagine a giant plus sign in between the two fours.
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Twice a number minus two giving us the answer as eight is number 5.
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A plus number.
A negative number minus a positive number will always be a negative number.
In number Systems , the opposite of the number can be represented by changing and reversing the sign of the number.-2 is the number is the opposite of the number 2.