解:(1)23.4-5.7-4.3,
=23.4-(5.7+4.3),
=23.4-10,
=13.4;
(2)(467+36×3)÷23,
=(467+108)÷23,
=575÷23,
=25;
(3)25×50×4×6,
=(25×4)×(50×6),
=100×300,
=30000;
(4)46×16+16×54,
=(46+54)×16,
=100×16,
=1600;
(5)14.9+3.7+5.1+6.3,
=(14.9+5.1)+(3.7+6.3),
=20+10,
=30;
(6)3800÷(1280-72×15),
=3800÷(1280-1080),
=3800÷200,
=19;
(7)1800-800÷25×16,
=1800-32×16,
=1800-512,
=1288;
(8)65×102,
=65×(100+2),
=6500+130,
=6630;
(9)99×48+48,
=(99+1)×48,
=100×48,
=4800.
分析:(1)運(yùn)用減法的性質(zhì)簡算;
(2)先算括號內(nèi)的乘法,再算括號內(nèi)的加法,最后算括號外的除法;
(3)運(yùn)用乘法交換律與結(jié)合律簡算;
(4)(9)運(yùn)用乘法分配律簡算;
(5)運(yùn)用加法交換律與結(jié)合律簡算;
(6)先算括號內(nèi)的乘法,再算括號內(nèi)的減法,最后算括號外的除法;
(7)先算除法和乘法,再算減法;
(8)把102看作100+2,運(yùn)用乘法分配律簡算.
點(diǎn)評:此題考查了小數(shù)、整數(shù)的四則混合運(yùn)算,注意運(yùn)算順序和運(yùn)算法則,靈活運(yùn)用所學(xué)的運(yùn)算定律簡便計(jì)算.