简便计算.
(1)101×59
(2)35+35×73+26×35
(3)6×127+71×2×3+12
(4)21×96+84
(5)25×(8+4)×125
(6)25×(8×4)×125.
解:(1)101×59,
=100×59+1×59,
=5900+59,
=5959;
(2)35+35×73+26×35,
=35×(1+73+26),
=35×100,
=3500;
(3)6×127+71×2×3+12,
=6×127+71×6+6×2,
=6×(127+71+2),
=6×200,
=1200;
(4)21×96+84,
=21×96+21×4,
=21×(96+4),
=21×100,
=2100;
(5)25×(8+4)×125,
=(25×8+25×4)×125,
=(200+100)×125,
=300×125,
=37500;
(6)25×(8×4)×125,
=(25×4)×(8×125),
=100×1000,
=100000.
分析:(1)101×59,转化为:(100+1)×59,运用乘法分配律简算;
(2)35+35×73+26×35,运用乘法分配律简算;
(3)6×127+71×2×3+12,转化为:6×127+71×6+6×2,运用乘法分配律简算;
(4)21×96+84,转化为:21×96+21×4,运用乘法分配律简算;
(5)25×(8+4)×125运用乘法分配律简算;
(6)25×(8×4)×125,运用乘法交换律和结合律简算.
点评:此题考查的目的是理解掌握乘法的运算定律,并且能够灵活运用乘法的运算定律进行简便计算.