分析:(1)2999×23+23,運(yùn)用乘法分配律進(jìn)行簡算;
(2)469-(175+69),根據(jù)減法的運(yùn)算性質(zhì),a-(b+c)=a-b-c,進(jìn)行簡算;
(3)808-156-144,根據(jù)減法的運(yùn)算性質(zhì),a-b-c=a-(b+c),進(jìn)行簡算;
(4)301×31-31,運(yùn)用乘法分配律進(jìn)行簡算;
(5)54×102,轉(zhuǎn)化為54+(100+2),再應(yīng)用乘法分配律進(jìn)行簡算;
(6)88×125,轉(zhuǎn)化為11×8×125,應(yīng)用乘法結(jié)合律進(jìn)行簡算;
解答:解:(1)2999×23+23,
=23×(2999+1),
=23×3000,
=69000;
(2)469-(175+69),
=469-69-175,
=400-175,
=225;
(3)808-156-144,
=808-(156+144),
=808-300,
=508;
(4)301×31-31,
=31×(301-1),
=31×300,
=9300;
(5)54×102,
=54×(100+2),
=54×100+54×2,
=5400+108,
=5508;
(6)88×125,
=11×(8×125),
=11×1000,
=11000.
點(diǎn)評(píng):此題主要考查運(yùn)用加法的運(yùn)算性質(zhì)和乘法的運(yùn)算定律進(jìn)行簡便計(jì)算.