Sure! Here’s a small word problem based on that number sentence:
Lily has 300 apples, and her friend Tom gives her another 300 apples. They decide to share some apples with their neighbors. After sharing, they have 500 apples left.
How many apples did Lily and Tom give away to their neighbors?
The answer can be found by solving the equation: 300 + 300 - ? = 500.