Hi Bob, happy to help with this. When you're asked to write an expression, it means that you need to represent a situation using an equation. The equation can contain letters and numbers.
- The question tells you that the letter m represents the number of cards John had yesterday.
- Today, Joh has more cards , so your equation should contain addition or multiplication to reflect the increase. Based on the phrasing of the question, "he got 25 more," you can tell that this is an addition problem.
In words, you would write "the number of cards Josh has today is equal to the number of cards Josh had yesterday, (which was m), plus the number he got today, which is 25. As an equation, this is written m + 25.
Hope this helps, and let me know if you have any questions!