解题思路:(1)先化简,再分类计算;
(2)先判定符号,再改为连乘计算;
(3)先算乘方,再算乘除;
(4)(5)利用乘法分配律简算;
(6)先算乘方和括号里面的,再算乘法,最后算减法.
(1)原式=-20-14+18-13
=-29;
(2)原式=-[3/2]×[3/4]×[4/9]
=-[1/2];
(3)原式=-8×[9/4]×[4/9]
=-8;
(4)原式=[5/12]×(-12)+[2/3]×(-12)-[3/4]×(-12)
=-5-8+9
=-4;
(5)原式=(-96)×(-0.125-[1/8]+[5/4])
=(-96)×1
=-96;
(6)原式=-1-[1/2]×[1/3]×[2-9]
=-1+[7/6]
=[1/6].
点评:
本题考点: 有理数的混合运算.
考点点评: 此题考查有理数的混合运算,掌握运算顺序,正确判定符号计算即可.