(1)14.5×64+64×4.5,
=64×(14.5+4.5),
=64×19,
=64×(20-1),
=64×20-64×1,
=1280-64,
=1216;
(2)2.5×32×12.5,
=2.5×4×8×12.5,
=(2.5×4)×(8×12.5),
=10×100,
=1000;
(3)(
4
5 +
1
4 )÷
7
3 +
7
10 ,
=
21
20 ×
3
7 +
7
10 ,
=
9
20 +
14
20 ,
=
23
20 ;
(4)168.1÷(4.3×2-0.4),
=168.1÷(8.6-0.4),
=168.1÷8.2,
=20.5.