Answer:
=0
Explanation:
You should try and understand signs before solving any question in mathematics
For example-6+7 means it negative 6 is added to 7
But the answer will be positive 1 because positive 7 is greater than the negative 6
I hope you understand
So back to the question
-456+456
Which means that negative 456 is added to 456
And the answer is 0
Because they have the same value but the difference between them is the sign
I believe this will help you