分析:(1)根據(jù)乘法交換律和結(jié)合律進(jìn)行計(jì)算;
(2)根據(jù)乘法分配律進(jìn)行計(jì)算;
(3)根據(jù)連除的性質(zhì)進(jìn)行計(jì)算;
(4)根據(jù)乘法分配律進(jìn)行計(jì)算;
(5)根據(jù)乘法分配律進(jìn)行計(jì)算;
(6)先算除法,再算加法.
解答:解:
(1)64×2.5×0.125,
=(8×8)×2.5×0.125,
=(8×2.5)×(8×0.125),
=20×1,
=20;
(2)3×0.8+3×2.2,
=3×(0.8+2.2),
=3×3,
=9;
(3)3.76÷0.4÷2.5,
=3.76÷(0.4×2.5),
=3.76÷1,
=3.76;
(4)(14.21+3.5)÷7,
=(14.21+3.5)×
,
=14.21×
+3.5×
,
=2.03+0.5,
=2.53;
(5)4.66×0.28+4.66×0.82-4.66,
=4.66×(0.28+0.82-1),
=4.66×0.1,
=0.466;
(6)2.4+57.6÷36,
=2.4+1.6,
=4.
點(diǎn)評:四則運(yùn)算,先弄清運(yùn)算順序,然后再進(jìn)一步計(jì)算,能簡算的要簡算.