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Math problems in the third grade: Xiaoming's home is 654 meters away from school, and Liangliang's home is 468 meters away from school. What is the nearest and farthest distance between them?
If Xiaoming's family, bright family and school are in a straight line, then there is a solution to this problem. If not, it can't be solved.
Suppose he can solve it. Solve the problem as follows: