分析:(1)根据减法的性质简算;
(2)(5)(7)直接运用乘法分配律简算;
(3)先把88分解成8×11,再运用乘法结合律简算;
(4)先把102分解成100+2,再运用乘法分配律简算;
(6)先把888×8变成111×64,再运用乘法分配律简算;
(8)运用乘法交换律简算.
解答:解:(1)7826-(826-1300),
=7826-826+1300,
=7000+1300,
=8300;
(2)87×99+87,
=87×(99+1),
=87×100,
=8700;
(3)125×88,
=125×(8×11),
=125×8×11,
=1000×11,
=11000;
(4)54×102,
=54×(100+2),
=54×100+54×2,
=5400+108,
=5508;
(5)125×(4+8),
=125×4+125×8,
=500+1000,
=1500;
(6)36×111+888×8,
=36×111+111×64,
=111×(36+64),
=111×100,
=11100;
(7)65×34+34×34+34,
=34×(65+34+1),
=34×100,
=3400;
(8)25×13×4,
=25×4×13,
=100×13,
=1300.
点评:此题是考查四则混合运算,要仔细观察算式的特点,灵活运用一些定律进行简便计算.