Please help, due in 12 minutes!

Whats 1+3?
Whats 4+0?
Whats 2+2?
0=−0

Its all and has explanation and rules to make next time easier.

What's 1+3 = 4

What's 4+0 = 4

What's 2+2 = 4

Addition Rules:

positive + positive = (add) positive. Ex: 2 + 1 = 3.

negative + negative = (add) negative. Ex: –3+ (–5) = –8.

negative + positive = (subtract) and. Ex: 2 + (–10) = –8.

take sign of number with largest. Ex: –14 + 16 = 2.

0=−0 because 0 it can be negative or become positive and an integer is a whole number that can be either greater than 0, called positive, or less than 0, called negative. Zero is neither positive nor negative. Two integers that are the same distance from the origin in opposite directions are called opposites.