分析:(1)根据积不变规律,第一个因数乘4,第二个因数除以4,然后再计算;
(2)根据除法的性质简算;
(3)先把16分解成8×2,再运用乘法结合律简算;
(4)(6)根据商不变规律简算;
(5)先把36分解成4×9,再运用乘法结合律简算;
(7)运用乘法交换律简算;
(8)先把14分解成2×7,再运用乘法结合律简算.
解答:解:(1)250×60,
=(250×4)×(60÷4),
=1000×15,
=15000;
(2)630÷35÷2,
=630÷(35×2),
=630÷70,
=9;
(3)125×16,
=125×8×2,
=1000×2,
=2000;
(4)800÷32,
=(800÷8)÷(32÷8),
=100÷4,
=25;
(5)25×36,
=25×4×9,
=100×9,
=900;
(6)810÷54,
=(810÷9)÷(54÷9),
=90÷6,
=15;
(7)22×6×5,
=22×5×6,
=110×6,
=660;
(8)55×14,
=55×2×7,
=110×7,
=770.
点评:完成本题要注意分析式中数据,运用合适的简便方法计算.