- 10 - (-3)
-10 - (-3) = -10 + 3 = -7
To subtract a negative number, we can change it to addition and reverse the sign.
In this case, we have -10 - (-3).
To change the second negative to addition, we rewrite the expression as -10 + 3.
Then, we add -10 and 3:
-10 + 3 = -7.
So, -10 - (-3) = -7.