解:(1)8470-104×65,
=8470-6760,
=1710;
(2)168.1÷(4.3×2-0.4),
=168.1÷8.2,
=20.5;
(3)3.64÷4+4.36×0.25,
=3.64×0.25+4.36×0.25,
=(3.64+4.36)×0.25,
=8×0.25,
=2;
(4)(
-
)×4×9,
=
×4×9-
×4×9,
=4-3,
=1;
(5)1.3-3.79+9.7-6.21,
=(1.3+9.7)-(3.79+6.21),
=11-10,
=1.
分析:(1)按四則運(yùn)算的運(yùn)算順序先算104×65,再算減;
(2)按四則運(yùn)算的運(yùn)算順序先算括號里的4.3×2,再算減去0.4,然后算括號外面的除;
(3)3.64÷4=3.64×0.25,然后根據(jù)乘法的分配律計(jì)算簡便;
(4)根據(jù)乘法的分配律計(jì)算簡便;
(5)利用加法的交換律和結(jié)合律計(jì)算簡便.
點(diǎn)評:考查了運(yùn)算定律與簡便運(yùn)算,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)算律簡便計(jì)算.