分析:(1)可用(a×b)÷c=a×(b÷c)進(jìn)行簡(jiǎn)算,
(5)、(6)可用乘法結(jié)合律來(lái)進(jìn)行簡(jiǎn)算,
(2)、(3)、(4)、(9)、(11)可用乘法分配律來(lái)進(jìn)行簡(jiǎn)算,
(7)、(10)可用加法交換律和加法結(jié)合律來(lái)進(jìn)行簡(jiǎn)算,
(8)可用a÷b÷c=a÷(b×c)來(lái)進(jìn)行簡(jiǎn)算,
(12)可用a-b-c=a-(b+c)進(jìn)行簡(jiǎn)算.
解答:解:(1)3500÷25
=35×100÷25,
=35×(100÷25),
=35×4,
=140;
(2)9×99
=(10-1)×99,
=10×99-99,
=990-99,
=891;
(3)125×103-125×3
=125×(103-3),
=125×100,
=12500;
(4)85×48+52×85
=85×(48+52),
=85×100,
=8500;
(5)125×32×25
=(125×8)×(4×25),
=1000×100,
=100000;
(6)125×88
=(125×8)×11,
=1000×11,
=11000;
(7)41+127+59+173
=(41+59)+(127+173),
=100+300,
=400;
(8)1300÷25÷4
=1300÷(25×4),
=1300÷100,
=13;
(9)156×l0l-156
=156×(101-1),
=156×100,
=15600;
(10)99+199+299+3
=(99+1)+(199+1)+(299+1),
=100+200+300,
=600;
(11)5×23+6×23-23
=(5+6-1)×23,
=10×23,
=230;
(12)2700-425-175
=2700-(425+175),
=2700-600,
=2100.
點(diǎn)評(píng):考查了學(xué)生的計(jì)算能力和靈活運(yùn)用簡(jiǎn)便算法的能力.