5 vans are needed to carry all the students
Step-by-step explanation:
Total number of 4th grade students = 40
Total number of students a van can carry = 8
Let the number of vans to carry the students = y
Total number of students a van can carry × number of vans to carry the students = Total number of 4th grade students
8 × y = 40
8y = 40
divide both sides by 8:
8y/8 = 40/8
y = 5
Hence, 5 vans are needed to carry all the students.