Solve the following problem:
(?)+(−2)=13 (?)+(-2)=13 (?)+(−2)=13
Let's locate the number 13 on the number line.
Since zero is greater than negative 2, we'll move two steps to the right from the number 13.
The number we've reached is 15:
888151515999141414131313121212111111101010-1-2
15 15 15