据分析解答如下:
(1)21.35-3.25-16.75,
=21.35-(3.25+16.75),
=21.35-20,
=1.35;
(2)33.02-(148.4-90.85)÷2.5,
=33.02-57.55÷2.5,
=33.02-23.02,
=10;
(3)32×2.5×0.125,
=4×8×2.5×0.125,
=(4×2.5)×(8×0.125),
=10×1,
=10;
(4)18.1+(3-0.299÷0.23)×1,
=18.1+(3-1.3)×1,
=18.1+1.7×1,
=18.1+1.7,
=19.8.