解:(1)原式=-20-14+18-13
=-47+18
=-29;
(2)原式=-
×
×(-
)×
=
;
(3)原式=1+4
=5;
(4)原式=(-
-
+
)×36
=-
×36-
×36+
×36
=-27-20+21
=-26;
(5)原式=-4+8×(-
)+12-(-1)
=-4-1+12+1
=8.
分析:(1)去括號(hào),然后進(jìn)行加減運(yùn)算;
(2)把小數(shù)化為分?jǐn)?shù)和除法轉(zhuǎn)化為乘法,然后約分即可;
(3)先進(jìn)行乘除法運(yùn)算,再進(jìn)行加法運(yùn)算;
(4)先把除法轉(zhuǎn)化為乘法,再利用乘法的分配律得到原式=(-
-
+
)×36=-
×36-
×36+
×36,再進(jìn)行乘法運(yùn)算,然后進(jìn)行加減運(yùn)算;
(5)先算乘方,再算乘除得到原式=-4+8×(-
)+12-(-1)=-4-1+12+1,然后進(jìn)行加減運(yùn)算.
點(diǎn)評(píng):本題考查了實(shí)數(shù)的混合運(yùn)算:先算乘方,再算乘除,然后進(jìn)行加減運(yùn)算;有括號(hào)先算括號(hào).也考查了乘法的分配律.