Final answer:
To calculate the number of students per bus, divide the total number of students, 180, by the number of buses, 4, which equals 45 students per bus.
Step-by-step explanation:
To find the number of students per bus, we divide the total number of students by the number of buses.
So, if there are 180 students and 4 buses, we calculate the number of students per bus by dividing 180 by 4.
180 ÷ 4 = 45
Therefore, there are 45 students per bus.