解:(1)25×18×4,
=25×4×18,
=100×18,
=1800;
(2)25×(40+7),
=25×40+25×7,
=1000+175,
=1175;
(3)18×56+44×18,
=18×(56+44),
=18×100,
=1800;
(4)201×41,
=(200+1)×41,
=200×41+1×41,
=8200+41,
=8241;
(5)38×99+38,
=38×(99+1),
=38×100,
=3800;
(6)101×74-74,
=(101-1)×74,
=100×74,
=7400;
(7)425+21×(12+28),
=425+21×40,
=425+840,
=1265;
(8)15×[120-(42+36)],
=15×[120-78],
=15×42,
=630;
(9)(450÷18-13)×80,
=(25-13)×80,
=12×80,
=960;
(10)600÷[2×(210-180)],
=600÷[2×30],
=600÷60,
=10.
分析:(1)运用乘法交换律简算;
(2)(3)(5)(6)运用乘法分配律简算;
(4)先把201分解成200+1,再运用乘法分配律简算;
(7)先算小括号里面的加法,再算括号外的乘法,最后算括号外的加法;
(8)先算小括号里面的加法,再算中括号里里面的减法,最后算括号外的乘法;
(9)先算小括号里面的除法,再算小括号里面的减法,最后算括号外的乘法;
(10)先算小括号里面的减法,再算中括号里面的乘法,最后算括号外的除法.
点评:本题考查了四则混合运算,注意运算顺序和运算法则,灵活运用所学的运算定律进行简便计算.