分析:(1)把7263拆成7200+63,把298拆成300-2,運(yùn)用加法交換律與結(jié)合律簡(jiǎn)算;
(2)運(yùn)用減法的性質(zhì)簡(jiǎn)算;
(3)(4)(6)運(yùn)用乘法分配律簡(jiǎn)算;
(5)把101看作100+1,運(yùn)用乘法分配律簡(jiǎn)算;
(7)把32看作4×8,運(yùn)用乘法交換律與結(jié)合律簡(jiǎn)算;
(8)通過(guò)“湊整法”,進(jìn)行簡(jiǎn)算.
解答:解:(1)7263+298
=(7200+63)+(300-2)
=(7200+300)+(63-2)
=7500+61
=7561;
(2)1923-456-544
=1923-(456+544)
=1923-1000
=923;
(3)265×99+265
=265×(99+1)
=265×100
=26500;
(4)(250+25)×40
=250×40+25×40
=10000+1000
=11000;
(5)101×87
=(100+1)×87
=100×87+87
=8700+87
=8787;
(6)13×49+49×87
=(13+87)×49
=100×49
=4900;
(7)125×25×32
=125×25×4×8
=(125×8)×(25×4)
=1000×100
=100000;
(8)9999+998+97+6
=(10000-1)+(1000-2)+(100-3)+6
=11100-6+6
=11100.
點(diǎn)評(píng):仔細(xì)注意觀察題目中數(shù)字構(gòu)成的特點(diǎn)和規(guī)律,運(yùn)用運(yùn)算定律或運(yùn)算技巧,進(jìn)行簡(jiǎn)便計(jì)算.