分析:(1)(6)(9)運(yùn)用乘法分配律簡(jiǎn)算;(2)括號(hào)內(nèi)的結(jié)果為1,故答案為3.2;(3)運(yùn)用乘法結(jié)合律簡(jiǎn)算;(4)先算除法,得數(shù)為1,故結(jié)果為3;(5)(10)運(yùn)用除法的性質(zhì)簡(jiǎn)算;(7)先算除法和乘法,再算加法;(8)(11)把百分?jǐn)?shù)化為小數(shù)計(jì)算;(12)注意小數(shù)點(diǎn)對(duì)齊.
解答:解:101×92-92=9200; 3.2÷(
×
)=3.2; 2.9×4×0.5=5.8; 4-1
÷1
=3;
600÷25÷8=3; 7.86×99+7.86=786; 3÷
+
×3=10; 4×25%=1;
(
+
)×4=4
; (0.18+0.9)÷9=0.12; 0.1÷10%=1; 4.4+56=60.4.
點(diǎn)評(píng):此題考查了多方面的知識(shí):運(yùn)算定律和性質(zhì)、運(yùn)算順序、數(shù)字轉(zhuǎn)化、小數(shù)點(diǎn)對(duì)齊等.根據(jù)題目特點(diǎn),靈活解答.