Answer:
Result -10
Step-by-step explanation:
We need to calcualte the result (R) of (-20)-(-10).
Firstly, we need to introduce the law of signs: the product or the quotient of two numbers of like the sign is positive. The product or the quotient of two numbers of unlike sign is negative. It means
++ = +
+- = -
-+ = -
--=+
Now we can apply this math law to the expression:
R =(-20) - (-10)
R=(-20) - - 10
As -- = + taking into account the law of signs
R = -20 + 10 = -10
Finally, the result of this expression is -10.
