能簡算的要簡算
168-52-48
125×88
382×101-382 156×l0l-156
164-83-64 25×73+25×27
360÷45 44×25
76000÷8÷125 99×27+27
125×56 3874-(680+874)
99×45 37+125+63+175
99×56+56-46 2688-534+112.
分析:(1)(5)(12)根據(jù)減法的性質(zhì)簡算;
(2)先把88分解成8×11,再運(yùn)用乘法結(jié)合律簡算;
(3)(4)(6)(10)(15)運(yùn)用乘法分配律簡算;
(7)先把45分解成9×5,再根據(jù)除法的性質(zhì)簡算;
(8)先把44分解成11×4,再運(yùn)用乘法結(jié)合律簡算;
(9)根據(jù)除法的性質(zhì)簡算;
(11)先把56分解成8×7,再運(yùn)用乘法結(jié)合律簡算;
(13)先把99分解成100-1,再運(yùn)用乘法分配律簡算;
(14)根據(jù)加法交換律和結(jié)合律簡算;
(16)根據(jù)加法交換律簡算.
解答:解:(1)168-52-48
=168-(52+48)
=168-100
=68;

(2)125×88
=125×8×11
=1000×11
=11000;

(3)382×101-382
=383×(101-1)
=382×100
=38200;

(4)156×l0l-156
=156×(101-1)
=156×100
=15600;

(5)164-83-64
=164-64-83
=100-83
=17;

(6)25×73+25×27
=25×(73+27)
=25×100
=2500;

(7)360÷45
=360÷(9×5)
=360÷9÷5
=40÷5
=8;

(8)44×25
=11×4×25
=11×(4×25)
=11×100
=1100;

(9)76000÷8÷125
=76000÷(8×125)
=76000÷1000
=76;

(10)99×27+27
=(99+1)×27
=100×27
=2700;

(11)125×56
=125×(8×7)
=125×8×7
=1000×7
=7000;

(12)3874-(680+874)
=3874-874-680
=3000-680
=2320;

(13)99×45
=(100-1)×45
=100×45-1×45
=4500-45
=4455;

(14)37+125+63+175
=(37+63)+(125+175)
=100+300
=400;

(15)99×56+56-46
=(99+1)×56-46
=100×56-46
=5600-46
=5554;

(16)2688-534+112
=2688+112-534
=2800-534
=2266.
點(diǎn)評:完成本題要注意分析式中數(shù)據(jù),運(yùn)用合適的簡便方法計(jì)算.
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