分析:(1)(5)(8)利用乘法分配律簡(jiǎn)算;
(2)(9)利用減法的性質(zhì)簡(jiǎn)算;
(3)把88拆成8×11,在計(jì)算;
(4)利用除法的性質(zhì)簡(jiǎn)算;
(6)把99看作100-1,再按乘法分配律簡(jiǎn)算;
(7)利用加法交換律與結(jié)合律簡(jiǎn)算;
(10)運(yùn)用乘法交換律與結(jié)合律簡(jiǎn)算.
解答:解:(1)49×99+49
=49×(99+1)
=49×100
=4900;
(2)168-52-48
=168-(52+48)
=168-100
=68;
(3)125×88
=125×8×11
=1000×11
=11000;
(4)1300÷25÷4
=1300÷(25×4)
=1300÷100
=13;
(5)156×l0l-156
=156×(l0l-1)
=156×100
=15600;
(6)99×45
=(100-1)×45
=100×45-1×45
=4500-45
=4455;
(7)37+125+63+175
=(37+63)+(125+175)
=100+300
=400;
(8)99×56+56-46
=(99+1)×56-46
=100×56-46
=5600-46
=5554;
(9)2688-534+34
=2688-(534-34)
=2688-500
=2188;
(10)8×(29×l25)
=(8×125)×29
=1000×29
=29000.
點(diǎn)評(píng):簡(jiǎn)算注意抓住運(yùn)算符號(hào)和數(shù)字特點(diǎn),靈活選用運(yùn)算定律簡(jiǎn)算即可.