分析:(1)(2)依據(jù)減法性質(zhì)解答;
(3)(5)(6)(7)(8)運(yùn)用乘法分配律解答;
(4)化32=4×8,再運(yùn)用乘法交換律和結(jié)合律解答.
解答:解:(1)178.4-45.3-54.7,
=178.4-(45.3+54.7),
=178.4-100,
=78.4;
(2)456-(256-144),
=456-256-144,
=200-144,
=56;
(3)102×45,
=100×45+2×45,
=4500+90,
=4590;
(4)32×125×25,
=(8×125)×(4×25),
=1000×100,
=100000;
(5)43×99+43,
=(99+1)×43,
=100×43,
=4300;
(6)(40+8)×25,
=40×25+8×25,
=1000+200,
=1200;
(7)73×99,
=73×100-73×1,
=7300-73,
=7227;
(8)54×11-54,
=(11-1)×54,
=10×54,
=540.
點(diǎn)評(píng):本題主要考查學(xué)生根據(jù)題干中各數(shù)之間的特點(diǎn)以及關(guān)系,正確選擇并運(yùn)用簡(jiǎn)便算法解決問題的能力.