分析:(1)根據(jù)有理數(shù)的加法法則進(jìn)行有理數(shù)的加法運(yùn)算:同號(hào)相加,取相同符號(hào),并把絕對(duì)值相加,絕對(duì)值不等的異號(hào)加減,取絕對(duì)值較大的加數(shù)符號(hào),并用較大的絕對(duì)值減去較小的絕對(duì)值,互為相反數(shù)的兩個(gè)數(shù)相加得0,一個(gè)數(shù)同0相加,仍得這個(gè)數(shù);
(2)根據(jù)乘法的分配律計(jì)算即可,在計(jì)算時(shí)注意符號(hào)的改變;
(3)根據(jù)有理數(shù)的運(yùn)算順序和運(yùn)算法則計(jì)算即可.
解答:解:(1)原式=45-92+5-8,
=-50;
(2)原式=1×(-24)+(-1
)×(-24)+(-
)×(-24)+
×(-24),
=-24+36+9-14,
=7;
(3)原式=-16+4-3×1,
=-16+4-3,
=-15.
點(diǎn)評(píng):(1)本題考查有理數(shù)的加法運(yùn)算,屬于基礎(chǔ)題,注意細(xì)心運(yùn)算;
(2)本題考查了有理數(shù)的乘法,屬于基礎(chǔ)題,注意細(xì)心運(yùn)算;
(3)本題考查了有理數(shù)的混合運(yùn)算,其運(yùn)算順序:先算乘方,再算乘除,最后算加減;同級(jí)運(yùn)算,應(yīng)按從左到右的順序進(jìn)行計(jì)算;如果有括號(hào),要先做括號(hào)內(nèi)的運(yùn)算.