Answer:
Matt will have 1 bag of candy left.
Step-by-step explanation:
If Matt has 3 1/2 bags of candy, and gives away 2 1/2 bags of candy, all you need to do is subtract 2 1/2 from 3 1/2.
3 1/2 - 2 1/2 = 1
Therefore, Matt will have 1 bag of candy left.