I'm on computer so examples will look weird so I will label them.
Answer:
Your answer will be 25.
Explanation:
1. You will rewrite the division as a fraction
Ex: 5 × (12+13)
____________
5
2. Cancel the common factor which is 5 so you will cross out the 5's
3. Then you would divide the (12+13) by 1
4. Finally you would add the 12 and the 13 to get 15.
I hope this helps. : )