8. In the sixth grade, each student will get 4 new books. There is one class of 15 students and one class of 20 students. The expression \( 4 \times(15+20) \) gives the total number of new books. Write a word expression for the numerical expression.

To write a word expression for the numerical expression \( 4 \times (15 + 20) \), we can break it down step by step: 1. **Identify the components of the expression**: - The number \( 4 \) represents the number of new books each student will receive. - The numbers \( 15 \) and \( 20 \) represent the number of students in the two classes. 2. **Combine these components into a word expression**: - First, we need to express the total number of students in both classes, which is \( 15 + 20 \). - Then, we multiply the total number of students by the number of books each student receives. 3. **Construct the word expression**: - "Four times the sum of the number of students in the first class and the number of students in the second class." Putting it all together, the word expression for the numerical expression \( 4 \times (15 + 20) \) is: **"Four times the total number of students in the two classes."**