Question

29 children rode their bikes to school. after some of the children rode home,there were 8 children with bikes still at school. how many children rode their bikes home?

Answer 1

21 children rode their bikes home 

Answer 2

Subtract how many students are still at the school from the amount of students that went to school in all:

29 students in all - 8 left = how many students went home

So this means:

29 students - 8 students = 21 students that went home