Rita has stickers. She gave half of them to her friend but her brother gave her 8. She ends up with 12 stickers. What arithmetic operations are used to solve this?

To solve this problem, the following arithmetic operations are used:

1. Division: Rita gave half of her stickers to her friend, which means she divided the number of stickers she had by 2.
2. Addition: Rita's brother gave her 8 stickers, so she needs to add 8 to the number of stickers she had after giving half to her friend. The total number of stickers after adding is 12.