Emily started with 15 tokens. She used 6 to play video games. On her way to purchase a drink she found a token. Hailey lost all her tokens so Emily gave her half of hers. Write an expression to show how many tokens Emily has left.

Emily started with 15 tokens and used 6 ...

15-6 (=9)

On her way to purchase a drink, she found a token.

9+1 (=10)

She gave Hailey half of her remaining tokens, which means she has half left.

10/2 (=5).

She has 5 remaining tokens, derived from (15-6+1) / 2