(1)(小-3)×1.20+小,
=2×1.20+小,
=2.4+小,
=7.4(元),
答:应付7.4元.
(2)(1小.2-小)÷1.20+3,
=10.2÷1.20+3,
=8.小+3,
=11.小(千米).
答:张老师回家时行驶11.小千米.
(1)(小-3)×1.20+小,
=2×1.20+小,
=2.4+小,
=7.4(元),
答:应付7.4元.
(2)(1小.2-小)÷1.20+3,
=10.2÷1.20+3,
=8.小+3,
=11.小(千米).
答:张老师回家时行驶11.小千米.