分析:(1)先算乘法,再算减法;
(2)先算小括号里面的减法,再算括号外的乘法;
(3)先同时运算乘法和除法,再算减法;
(4)先算小括号里面的乘法,再算小括号里面的减法,最后算括号外的除法;
(5)先算小括号里面的乘法,再算小括号里面的减法,最后算括号外的除法;
(6)先算小括号里面的加法,再把64分解成8×8,运用乘法结合律计算乘法,最后算减法.
解答:解:(1)1000-71×8,
=1000-568,
=432;
(2)(1800-800)×4,
=1000×4,
=4000;
(3)19×96-962÷74,
=1824-13,
=1811;
(4)(639-71×9)÷167,
=(639-639)÷167,
=0÷167,
=0;
(5)(10800-800×4)÷4,
=(10800-3200)÷4,
=7600÷4,
=1900;
(6)10000-(59+66)×64,
=10000-125×64,
=10000-125×8×8,
=10000-1000×8,
=10000-8000,
=2000.
点评:1.一个算式里,如果含有两级运算,要先做第二级运算,后做第一级运算.2.一个算式里,如果有括号,要先算小括号里的.