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65×73+28×65-65.8000÷125÷24×6.210×8÷105×125.450÷90-360÷90.981+5×9810+49×981.25×64×125.56000÷(14000÷16)45000÷(25×90)37500÷4÷25.9600÷25.125×91÷25.125×72÷9.125×38÷

题目详情
65×73+28×65-65. 8000÷125÷24×6. 210×8÷105×125. 450÷90-360÷90.
981+5×9810+49×981. 25×64×125. 56000÷(14000÷16) 45000÷(25×90)
37500÷4÷25. 9600÷25. 125×91÷25. 125×72÷9.
125×38÷19. 2847-399-1601. 285+305-5.
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答案和解析
(1)65×73+28×65-65,
=65×(73+28-1),
=65×100,
=6500;

(2)8000÷125÷24×6,
=64×6÷24,
=384÷24,
=16;

(3)210×8÷105×125,
=210÷105×(8×125),
=2×1000,
=2000;

(4)450÷90-360÷90,
=(450-360)÷90,
=90÷90,
=1;

(5)981+5×9810+49×981,
=981+50×981+49×981,
=(1+50+49)×981,
=100×981,
=98100;

(6)25×64×125,
=(25×8)×(8×125),
=200×1000,
=200000;

(7)56000÷(14000÷16),
=56000÷875,
=64;

(8)45000÷(25×90),
=45000÷90÷25,
=500÷25,
=20;

(9)37500÷4÷25,
=37500÷(4×25),
=37500÷100,
=375;

(10)960÷25,
=(960×4)÷(25×4),
=3840÷100,
=38.4;

(11)125×91÷25,
=125÷25×91,
=5×91,
=455;

(12)125×72÷9,
=125×8×(9÷9),
=1000×1,
=1000;

(13)125×38÷19,
=125×(38÷19),
=125×2,
=250;

(14)2847-399-1601,
=2847-(399+1601),
=2847-2000,
=847;

(15)285+305-5,
=285+(305-5),
=285+300,
=585.