20100÷(106+94×6)(1274-1260÷28)×2
125×16×25(450-50×8)÷25
25×20×12548×52-24×2+49×48
83×97-56×83+83×599999×8888
4368+42+58×3765×(207-87+29)
[(187-87)×35-200]=150.

解:(1)20100÷(106+94×6)
=20100÷(106+564),
=20100÷670,
=30;

(2)(1274-1260÷28)×2
=(1274-45)×2,
=1229×2,
=2458;

(3)125×16×25
=125×8×(2×25),
=1000×50,
=50000;

(4)(450-50×8)÷25
=(450-400)÷25,
=50÷25,
=2;

(5)25×20×125
=500×125,
=62500;

(6)48×52-24×2+49×48
=48×52-48+49×48,
=(52+49-1)×48,
=100×48,
=4800;

(7)83×97-56×83+83×59
=(59-56+97)×83,
=100×83,
=8300;

(8)9999×8888
=(10000-1)×8888,
=10000×8888-8888,
=88880000-8888,
=88871112;

(9)4368+42+58×37,
=4368+42+2146,
=4410+2146,
=6556;

(10)65×(207-87+29)
=65×(120+29),
=65×149,
=9685;

(11)[(187-87)×35-200]÷150
=(100×35-200)÷150,
=(3500-200)÷150,
=3300÷150,
=22.
分析:(1)(2)(4)(5)(9)(10)(11)根據(jù)四則混合運(yùn)算的運(yùn)算順序計(jì)算即可:先算乘除,再算加減,有括號的要先算括號里面的.
(3)可將16拆分為8×2后根據(jù)乘法結(jié)合律計(jì)算;
(6)(7)可根據(jù)乘法分配律計(jì)算;
(8)可將9999變?yōu)?0000-1后根據(jù)乘法分配律計(jì)算;
點(diǎn)評:本題考查了四則混合運(yùn)算,注意運(yùn)算順序和運(yùn)算法則,靈活運(yùn)用所學(xué)的運(yùn)算定律進(jìn)行簡便計(jì)算.
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科目:小學(xué)數(shù)學(xué) 來源: 題型:

20100÷(106+94×6) (1274-1260÷28)×2
125×16×25 (450-50×8)÷25
25×20×125 48×52-24×2+49×48
83×97-56×83+83×59 9999×8888
4368+42+58×37 65×(207-87+29)
[(187-87)×35-200]=150.

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