用简便方法计算: 125×32×25 78×103 25×36×11 14×37+63×14 (25+125 )×8 5×4×20×25.
(1)125×32×25,
=125×8×4×25,
=(125×8)×(4×25),
=1000×100,
=100000;
(2)78×103,
=78×(100+3),
=78×100+78×3,
=7800+234,
=8034;
(3)25×36×11,
=25×4×9×11,
=(25×4)×(9×11),
=100×99,
=9900;
(4)14×37+63×14,
=14×(37+63),
=14×100,
=1400;
(5)(25+125 )×8,
=25×8+125×8,
=200+1000,
=1200;
(6)5×4×20×25,
=4×25×5×20,
=(4×25)×(5×20),
=100×100,
=10000;
=125×8×4×25,
=(125×8)×(4×25),
=1000×100,
=100000;
(2)78×103,
=78×(100+3),
=78×100+78×3,
=7800+234,
=8034;
(3)25×36×11,
=25×4×9×11,
=(25×4)×(9×11),
=100×99,
=9900;
(4)14×37+63×14,
=14×(37+63),
=14×100,
=1400;
(5)(25+125 )×8,
=25×8+125×8,
=200+1000,
=1200;
(6)5×4×20×25,
=4×25×5×20,
=(4×25)×(5×20),
=100×100,
=10000;
温馨提示:答案为网友推荐,仅供参考