Solution:
1. Given the expression:
3 \times 8 - (2 + 1) + 8
2. First, calculate the multiplication:
3 \times 8 = 24
3. Then, calculate the addition inside the parenthesis:
2 + 1 = 3
4. Substitute the results back into the expression:
24 - 3 + 8
5. Perform the subtraction:
24 - 3 = 21
6. Finally, perform the addition:
21 + 8 = 29
So, the value of the expression is 29.