Zero plus zero is. Zero.

Zero plus one is. One.

Zero plus two is. Two.

Zero plus three is. Three.

Zero plus four is. Four.

Zero plus five is. Five.

Zero plus six is. Six.

Zero plus seven is. Seven.

Zero plus eight is. Eight.

Zero plus nine is. Nine.

Zero plus ten is. Ten.

Zero plus eleven is. Eleven.

Zero plus twelve is. Twelve.