Help me with the answers of 1.1
1.2
1.3 A
![Help me with the answers of 11 12 13 A class=](https://us-static.z-dn.net/files/d37/0cd36a97884997fef0543c7c27c572bf.png)
Answer:
a And b same number but different in sign. for example-5+5=0