(1)91.56-80.5-1.56;
(2)2.5×45.76×0.04.
分析:(1)根據(jù)減法的性質(zhì)簡(jiǎn)算;
(2)運(yùn)用乘法交換律簡(jiǎn)算.
解答:解:(1)91.56-80.5-1.56
=91.56-1.56-80.5
=90-80.5
=9.5;

(2)2.5×45.76×0.04
=2.5×0.04×45.76
=0.1×45.76
=4.576.
點(diǎn)評(píng):此題是考查四則混合運(yùn)算,要仔細(xì)觀察算式的特點(diǎn),靈活運(yùn)用一些定律進(jìn)行簡(jiǎn)便計(jì)算.
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