(1)2632-450÷18×25,
=2632-625,
=2007;
(2)1.8÷0.75-0.48×0.5,
=2.4-0.24,
=2.16;
(3)(
7
8+
3
4])÷[13/11−
4
5],
=[13/8]×[11/13]-[4/5],
=[11/8]-[4/5],
=[23/40];
(4)[1/6]÷[1÷([14/15]-[9/10])],
=[1/6]÷[1÷[1/30]],
[1/6]÷30,
=[1/6]×[1/30],
=[1/180].
(1)2632-450÷18×25,
=2632-625,
=2007;
(2)1.8÷0.75-0.48×0.5,
=2.4-0.24,
=2.16;
(3)(
7
8+
3
4])÷[13/11−
4
5],
=[13/8]×[11/13]-[4/5],
=[11/8]-[4/5],
=[23/40];
(4)[1/6]÷[1÷([14/15]-[9/10])],
=[1/6]÷[1÷[1/30]],
[1/6]÷30,
=[1/6]×[1/30],
=[1/180].