( 16.6-7)÷ 1.6,
=9.6÷ 1.6,
=6 (km);
6+3=9 (km);
Xu teacher's school is 9 kilometers away from his hometown.
②6×2-3 = 9(km);
7+ 1.2×9,
=7+ 10.8,
= 17.8 (yuan);
Answer: He has to pay at least 17.8 yuan taxi fare.