(1)6.7-3.15-1.85,
=6.7-(3.15+1.85),
=6.7-5,
=1.7;
(2)0.25×32×12.5,
=(0.25×4)×(8×12.5),
=1×100,
=100;
(3)(
4
9+
5
12−
7
18)×36,
=
4
9×36+
5
12×36−
7
18×36,
=16+15-14,
=17.
(1)6.7-3.15-1.85,
=6.7-(3.15+1.85),
=6.7-5,
=1.7;
(2)0.25×32×12.5,
=(0.25×4)×(8×12.5),
=1×100,
=100;
(3)(
4
9+
5
12−
7
18)×36,
=
4
9×36+
5
12×36−
7
18×36,
=16+15-14,
=17.