John goes to the store to buy Slurpees and gives them $20.  Slurpees cost $2 each and he got $8 in change.  How many Slurpees did he buy?
He spent 20-8=$<<20-8=12>>12 on Slurpees
So he got 12/2=<<12/2=6>>6 Slurpees
#### 6