(1)9-4.8÷6×0.5,
=9-0.4,
=8.6;
(2)2.16÷[64.8-(51.3-2.7×3],
=2.16÷[64.8-(51.3-8.1],
=2.16÷[64.8-43.2],
=2.16÷21.6,
=0.1;
(3)(1.4×0.3+2.46)÷1.8,
=(0.42+2.46)÷1.8,
=2.88÷1.8,
=1.6;
(4)(2.5÷2+2÷2.5)×0.4,
=(1.25+0.8)×0.4,
=2.05×0.4,
=0.82;
(5)3.71+3.71×17.4-8.4×3.71,
=(1+17.4-8.4)×3.71,
=10×3.71,
=37.1;
(6)1.2+8.8×1.25,
=1.2+(8+0.8)×1.25,
=1.2+8×1.25+0.8×1.25,
=1.2+10+1,
=12.2.