The expression (-9) - (-9) = _____?
The expression (-9) - (-9) = _____?
Explanation
(-9) - (-9)
= -9 + 9 (since subtracting a negative is equivalent to adding a positive)
= 0
(-9) - (-9)
= -9 + 9 (since subtracting a negative is equivalent to adding a positive)
= 0