(1)18.5+4.1×7.2-9.5,
=18.5+29.52-9.5,
=48.02-9.5,
=38.52;
(2)10.48+22.56÷4.7×5.4,
=10.48+4.8×5.4,
=10.48+25.92,
=36.4;
(3)18-(1.4-1.25×0.8),
=18-(1.4-1),
=18-0.4,
=17.6;
(4)0.8×[13-(3.12+5.28)],
=0.8×[13-8.4],
=0.8×4.6,
=3.68.
(1)18.5+4.1×7.2-9.5,
=18.5+29.52-9.5,
=48.02-9.5,
=38.52;
(2)10.48+22.56÷4.7×5.4,
=10.48+4.8×5.4,
=10.48+25.92,
=36.4;
(3)18-(1.4-1.25×0.8),
=18-(1.4-1),
=18-0.4,
=17.6;
(4)0.8×[13-(3.12+5.28)],
=0.8×[13-8.4],
=0.8×4.6,
=3.68.