180题分数乘除法简便运算

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分数乘除法简便运算专项练习180题(有答案)



(1)×101﹣,

(2)×÷×,

(3)×99+,

(4)( +)×,

(5)×+×﹣,

(6)3×25,

(7)36×,
(8)(﹣)×,

(9),

(10),

(11),

(12),

(13),


(14)85×,

(15)×25,

(16)(+)×7×5,

(17)×+×,

(18)×12+×19+,

(19)(﹣)×24

(20)×+×

(21)

(22)(+)×15×17

(23)×101,

(24)×+×

(25)(+)×24

(26)××13×

(27)×12﹣




(28)4.8×+4.8÷,

(29)×+×,

(30)+++…+

(31)

(32)

(33)25×(+)×17

(34)×18+2×17

(35)11×(﹣)×17

(36)×86

(37)

(38)×﹣×,

(39),

(40)×+÷9,

(41)32×,


(42)39÷7+31×,

(43)÷[(﹣)+(﹣)],


(44)2008×


(45)+++…+


(46)(+)×27×9,


(47)××,

(48)××…××,


(49)(﹣)×60,


(50)×+×,


(51)25×8,


(52)×(15×)×,

(53)×2005,

(54)××13×11,

(55)(+)×,

(56)×21+28×,

(57)×+×﹣,

(58)( +)×8×4,

(59)34÷35×36,

(60)×+×,

(61)×+××(﹣),

(62)138×,

(63)4×(﹣)×7,

(64)×+×,

(65)×+,


(66)(﹣)×,


(67)××,


(68)×+×+,

(69)45×+×43,


(70)×,


(71),


(72)(+﹣)×24


(73)×+÷

(74)(+﹣)÷,


(75),



(76)÷5+×,

(77)13﹣(2﹣),

(78)(+﹣﹣)÷,

(79)2004×

(80)8﹣3﹣1+1,

(81),

(82),

(83)×+÷﹣1÷4,

(84)
76×(﹣)+23×(+)﹣53×(﹣),



(85) ×


(86)27×(﹣)×37

(87)17×+×62+17÷48



(88)2013÷﹣2013÷2012

(89)

(90)

(91)

(92)

(93)×+×

(94)(3×)×4××

(95)×+×

(96)14×﹣

(97)(+)×12

(98)×+×

(99)

(100)

(101)×2007


(102)×101﹣

(103)

(104)

(105)×(9﹣)

(106)12.1﹣()×105

(107)(﹣+)×28+10.1

(108)(++)×2

(109)×80

(110)8×

(111)5.5×+×

(112)897×﹣+104×0.375

(113)×86+5.75×(3.5﹣)

(114)

(115)


(116)×24

(117)

(118)20÷﹣÷


(119)14÷14

(120)333387×79+66661×790


(121))×48


(122)18×+2×﹣


(123)41×+51×+61×


(124)2001×

(125)1998÷


(126).



(127)(﹣)×23×35,

(128)×+÷4

(129)48×(+﹣)

(130)35×﹣+11×

(131)××18×

(132)×31﹣

(133)(90+)×

(134)34×

(135)35×

(136)×2006

(137)×39+×27

(138)×35+×17

(139)×5+×5+×10

(140)7×13×(﹣)


(141)×+×

(142)×+×+×

(143)×+×,

(144)(++)×12,

(145),

(146)×25××19,

(147)(+)×54,

(148)(+)×8×7,

(149),

(150)×+×+×,

(151)20112011,

(152)139×﹣137×

(153)2012×

(154)+++++…+


(155)×2008﹣2007,

(156),

(157),

(158),

(159)++++,


(160)3+6×0.25+0.625×6+6×0.125,


(161)×+×+×,

(162)×+×+×,

(163)[2+(5.4﹣3)×1]÷3

(164)×(4.85÷﹣3.6+6.15×3)

(165)

(166),




(167)2011÷2011+


(168)11×+13×+15×+17×+


(169)()÷(+﹣)


(170)148×+86×+74×,


(171)2011×﹣2011×﹣2011×,

(172),


(173)13+86×0.25+86×0.625+86×


(174) ,


(175).




(176)
(1+++)×(+++)﹣(1++++)×(++),



(177)238÷



(178)2000÷





(179)
(+++)×(+++)﹣(++++)×(++)



(180),




























分数乘除法简便运算180题参考答案:

(1)×101﹣,
=×(101﹣1),
=×100,
=70;
(2)×÷×,
=×××,
=(×)×(×),
=×1,
=;
(3)×99+,
=×(99+1),
=×100,
=60;
(4)( +)×,
=×,
=;
(5)×+×﹣,
=(+﹣1)×,
=×,
=;
(6)3×25,
=(3+)×25,
=3×25+×25,
=75+20,
=95;

(7)36×,
=(35+1)×,
=35×+1×,
=34+,
=34;
(8)(﹣)×,
=×﹣×,
=3﹣2,
=1.
(9),
=12×+12×,
=4+3,
=7;
(90),
=×(+),
=×1,
=;
(11),
=(30+1)×,
=30×+1×,
=19+,
=19;
(12),
=×48﹣×48,
=8﹣6,
=2;
(13),


=×(11﹣1),
=×10,
=7.
(14)85×,
=(86﹣1)×,
=86×﹣1×,
=3﹣,
=2;
(15)×25,
=×(24+1),
=×24+×1,
=5+,
=5;
(16)(+)×7×5,
=×7×5+×7×5,
=15+7,
=22
(17)×+×,
=×+×,
=×(+),
=×,
=;
(18)×12+×19+,
=×(12+19+1),
=×32,
=20.
(19)(﹣)×24
=×24﹣×24
=6﹣4
=2;
(20)×+×
=×+×
=×(+)

=;
(21)
=×+×
=(+)×
=1×
=.
(22)(+)×15×17
=(+)×(15×17)
=×15×17+×17×15
=17+30
=47;
(23)×101,
=×(100+1),
=×100+1×,
=79+,
=79;
(24)×+×
=×(+)



=×1
=;
(25)(+)×24
=×24+×24
=3+2
=5;
(26)××13×
=(×13)×(×)
=2×
=1;
(27)×12﹣
=×(12﹣1)
=×11
=3
(28)4.8×+4.8÷,
=4.8×+4.8×,
=4.8×(+),
=4.8×1,
=4.8;
(29)×+×,
=×+×,
=×(+),
=×1,
=;
(30)+++…+
=1﹣+﹣+﹣+…+﹣
=1﹣
=.
(31)
=()×
=1×
=;
(32)
=×+×
=×(+)
=×1
=;
(33)25×(+)×17
=25×17×+×25×17
=119+125
=244
(34)×18+2×17
=×18+6××17
=×(18+6×17)
=×220
=88
(35)11×(﹣)×17
=11×17×﹣×17×11
=17﹣11
=6
(36)×86
=×(87﹣1)
=×87﹣
=86﹣


=85
(37)
=×+×
=×(+)
=×1
=.
(38)×﹣×,
=(﹣)×,
=1×,
=;
(39),
=×48+×48﹣×48,
=10+28﹣32,
=6;

(40)×+÷9,
=×+×,
=(+)×,
=1×,
=;
(41)32×,
=(33﹣1)×,
=33×﹣,
=13﹣,
=12.
(42)39÷7+31×,
=(39+31)×,
=70×,
=10;
(43)÷[(﹣)+(﹣)],
=÷[+],
=,
=;
(44)2008×
=(2008+)×
=2008×+×
=1+
=1;
(45)+++…+
=×(﹣+﹣+…+﹣)
=×(﹣)

=.
(46(+)×27×9,
=×72×9+×27×9,
=144+45,
=189

(47)××,
=×(×),
=×,
=;


(48)××…××,
=.
(49)(﹣)×60,
=×60﹣×60,
=35﹣12,
=23;
(50)×+×,
=(+)×,
=;
(51)25×8,
=25×8+×8,
=200+3,
=203;
(52)×(15×)×,
=(×)×(15×),
=×2,
=.
(53)×2005,
=×(2004+1),
=×2004+1×,
=2003+,
=2003;
(54)××13×11,
=,
=10×1,
=10;
(55)(+)×,
=,
=11,
=;
(56)×21+28×,
=(21+28)×,
=49×,
=13;
(57)×+×﹣,
=(﹣1)×,
=×,
=;
(58)( +)×8×4,
=,
=24+20,
=44;
(59)34÷35×36,
=(35+1),
=
=34,
=;
(60)×+×,
=,
=,
=,
=.
(61)×+××(﹣),


=×+××,
=×(+×),
=×(+),
=×,
=;
(62)138×,
=(137+1)×,
=137×+1×,
=7+,
=7
(63)4×(﹣)×7,
=( 4×7)×(﹣),
=4××7﹣7××4,
=21﹣8,
=13;

(64)×+×,
=(+)×,
=1×,
=;
(65)×+,
=+,
=;
(66)(﹣)×,
=×,
=;
(67)××,
=×,
=;
(68)×+×+,
=×(++1),
=×2,
=,
(69)45×+×43,
=(45+37)×,
=88×,
=86;

(70)×,
=,
=51;
(71),
=(1﹣+﹣+﹣+…+﹣)×,
=(1﹣)×,
=×,
=;
(72)(+﹣)×24
=×24+×24﹣×24
=6+44﹣50
=0;
(73)×+÷
=×+×
=(+)×





=1×
=.
(74)(+﹣)÷,
=×24+×24﹣×24,
=20+21﹣10,
=31;
(75),
=3×(8﹣1+3),
=×10,
=;
(76)÷5+×,
=×+×,
=(+)×,
=×,
=;
(77)13﹣(2﹣),
=13﹣2+,
=(13+)﹣2,
=14﹣2,
=11;
(78)(+﹣﹣)÷,
=(+﹣﹣)×48,
=×48+×48﹣×48﹣×48,
=40+30﹣20﹣21,
=29;
(79)2004×
=(2003+1)×
=2003×+1×
=2002+
=2002;

(80)8﹣3﹣1+1,
=(8+1)﹣(3+1),
=10﹣5,
=5.
(81),
=(1﹣)×41,
=1×41﹣×41,
=41﹣,
=40;
(82),
=(2010+1)×,
=2010×+1×,
=19+,
=19
(83)×+÷﹣1÷4,
=×+×﹣,
=×(+﹣1),
=×2,
=;
(84)
76×(﹣)+23×(+)﹣53×(﹣),< br>=76×﹣×76+23×+×23﹣53×+×53,


=﹣++﹣+,
=(﹣)+(+)﹣(﹣),
=1+1﹣1,
=1.
(85) ×
=×﹣×
=(+)×﹣×+7
=×﹣×+7
=﹣1+7
=6.
(86)27×(﹣)×37
=27××37﹣×37×27
=74﹣54
=20;
(87)17×+×62+17÷48
=17×+×17+17×
=17×(++)
=17×2
=34;
(88)2013÷﹣2013÷2012
=2013×﹣2013×
=2013×(﹣)
=2013×1
=2013
(89)
=
=()×
=1×
=;
(90)
=
=
=9;
(91)
=
=35+42﹣40
=77﹣40
=37;
(92)
=
=
=×33
=×33
=11
(93)×+×
=×(+)

=;
(94)(3×)×4××
=3××××
=;
(95)×+×
=(+)×
=1×
=;



(96)14×﹣
=(14﹣1)×
=13×
=7;
(97)(+)×12
=×12+×12
=4+3
=7.
(98)×+×
=×(+)
=×1
=;

(99)
=×(18+1)
=×19
=13;
(100)
=×27+×27﹣×27
=24+18﹣5
=37;

(101)×2007
=×(2006+1)
=×2006+×1
=2005+
=2005;
(102)×101﹣
=×(101﹣1)
=×100
=64.
(103)
=×+×
=(+)×
=1×
=;
(104)
=1÷×

=.
(105)×(9﹣)
=×9﹣×
=7﹣
=6
(106)12.1﹣()×105
=12.1﹣(×105+×105)
=12.1﹣(7+5)
=0.1
(107)(﹣+)×28+10.1
=×28﹣×28+×28+10.1
=22﹣20+5+10.1
=17.1
(108)(++)×2
=×+×+×
=++


=
(109)×80
=×(79+1)
=×79+
=78
(110)8×
=8×125+8×
=1000+2.5
=1002.5
(111)5.5×+×
=5.5×(+)
=5.5×10
=55
(112)897×﹣+104×0.375
=×(897﹣1+104)
=×1000
=375
(113)×86+5.75×(3.5﹣)
=×86+5.75×(3.5﹣3.1)
=494.5+5.75×0.4
=494.5+2.3
=496.8
(114)
=×27+×27
=12+5
=17;
(115)
=××15
=×15
=;
(116)×24
=(100﹣)×24
=100×24﹣×24
=2400﹣3
=2397;
(117)
=
=
=30.
(118)20÷﹣÷

20×﹣×
=
=(20﹣)×
=20×
=25;
(119)14÷14
=(14+)×
=14×+×
=1+
=1.
(120)333387×79+66661×790
=333387.5×79+666612.5×79
=(333387.5+666612.5)×79
=1000000×79
=79000000
(121))×48
=×48+×48+×48,
=40+28+32,
=100;


(122)18×+2×﹣
=(18+2﹣1)×,
=20×,
=19;
(123)41×+51×+61×
=(40+1)×+(50+1)×+(60+1)×,
=40×+×+50×+×+60×+×,
=30+1+40+1+50+1,
=123;
(124)2001×
=(2000+1)×,
=2000×+1×,
=1999+,
=1999;
(125)1998÷
=19998÷,
=1998×,
=;
(126).
=++++++
=1﹣+﹣+﹣+…+﹣,
=.
(127)(﹣)×23×35,
=×23×35﹣×23×35,
=70﹣46,
=24
(128)×+÷4
=×+×
=×(+)
=×1
=;
(129)48×(+﹣)
=48×+48×﹣48×
=5+26﹣28
=3;
(130)35×﹣+11×
=×(35﹣1+11)
=×45
=20
(131)××18×
=×××18
=×1
=;
(132)×31﹣
=(31﹣1)×
=30×
=19;

(133)(90+)×
=(89+)×
=1+
=1;
(134)34×
=(33+1)×


=13+
=13;
(135)35×
=(36﹣1)×
=11﹣
=10;


(136)×2006
=×(2007﹣1)
=2006﹣
=2005;
(137)×39+×27
=×13+×27
=×(13+27)
=×40
=30;
(138)×35+×17
=×7+×17
=×(7+17)
=×24
=20;
(139)×5+×5+×10
=×5+×25+×10
=×(5+25+10)
=×40
=5;
(140)7×13×(﹣)
=7×13×﹣7×13×
=104﹣98
=6;
(141)×+×
=×+×
=×(+)
=×1
=;

(142)×+×+×
=×+×+×
=×(++)

=.
(143)×+×,
=,
=(),
=,
=;
(144)(++)×12,
=121212,
=6+8+9,
=23;
(145),
=,
=(1),


=,
=
(146)×25××19,
=(×19)×(25×),
=4×15,
=60;
(147)(+)×54,
=×54+×54,
=48+45,
=93;
(148)(+)×8×7,
=×8×7+×8×7,
=35+24,
=59
(149),
=10×﹣6.4×+1.2×,
=(10﹣6.4+1.2)×,
=(3.6+1.2)×,
=4.8×,
=0.6
(150)×+×+×,
=×(++),
=×,
=;
(151)20112011,
=×,
=×,
=;
(152)139×﹣137×
=(138+1)×﹣(138﹣1)×
=138×+﹣138×+
=137﹣1+(+)
=136+1
=137
(153)2012×




=2011
(154)+++++…+
=1﹣+﹣+﹣+﹣+﹣+…+﹣
=1﹣
=
(155)×2008﹣2007,
=×2009﹣×1﹣2007,
=2008﹣﹣2007,
=1﹣,
=;
(156),
=()×,
=10×,
=10×(7+),
=10×7+10×,


=70+1,
=71;
(157),
=×(666+2)+×666,
=×666+×2+×666,
=(+)×666+×2,
=1×666+,
=666,
(158),
=×4+3×﹣5×,
=×(4+3﹣5),
=×3,
=.
(159)++++,
=(﹣+﹣+﹣+﹣+﹣)×,
=(1﹣+﹣)×,
=(+)×,
=×,
=.
(160)3+6×0.25+0.625 ×6+6×0.125,
=3+6×(0.25+0.625+0.125),
=3+6×1,
=3+6,
=10.
(161)×+×+×,
=×(++),
=×13,
=(4+)×13,
=4×13+×13,
=52+7,
=59;
(162)×+×+×,
=(60+)×+(70+)×+(90+)×,
=60×+×+70×+×+90×+×,
=50+1+60+1+80+1,
=(50+60+80)+(1+1+1),
=190+3,
=193.
(163)[2+(5.4﹣3)×1]÷3
=[2+(5.4×1﹣3×1)]÷3
=[2+(9﹣6)]÷3
=[2+2]÷3
=5÷3
=;
(164)×(4.85÷﹣3.6+6.15×3)
=×(4.85×3.6﹣3.6+6.15×3.6)
=×(4.85﹣1+6.15)×3.6
=×10×3.6
=×3.6×10
=0.9×10
=9;
(165)
=×5+5+5×


=(+1+)×5
=2×5
=10.
(166),
=(1000﹣)×
=1000×﹣×
=250﹣,
=249.
(167)2011÷2011+
=2011÷+
=2011×+
=+
=1
(168)11×+13×+15×+17×+
=(13﹣2)×+(15﹣2)×+(17﹣2)×+(19
﹣2)×+
=13×﹣2×+15×﹣2×+17×﹣2×
+19×﹣2×+
=2﹣+2﹣+2﹣+2﹣+
=2×5﹣(+++﹣)
=10﹣
=10﹣
=9.
(169)()÷(+﹣)
=[()×]÷[(+﹣)×]
=[()×]÷(﹣+)
=.
(170)148×+86×+74×,
=148×+148×+148×,
=148×(++),
=148×1,
=148.
(171)2011×﹣2011×﹣2011×,
=2011×(﹣﹣),
=2011×(﹣﹣),
=2011×0,
=0.
(172)

=(2×0.8+2×6.2﹣5.8×2﹣0.2×2)×,
=[(0.8+6.2)﹣(5.8+0.2)]×2×,
=(7﹣6)×(×),
=1×1,
=1.
(173)13+86×0.25+86×0.625+86×
=13+86×(0.25+0.625+0.125)
=13+86×1
=13+86
=100

(174)

=(33 33×3×+3333×﹣3333×2×)×﹣1330,
=3333×(+﹣)×﹣1330,


=3333××﹣1330,
=3333﹣1330,
=2003.
(175).
1998÷1998,
=1998,
=1998,
=1998×,
=.
(176)
(1+++)× (+++)﹣(1++++)×(++),
=(1+++)×(+++)﹣(1+++)×(++)﹣× (++),
=(1+++)×﹣×(++),
=×1,
=.
(177)238÷
=238÷
=238×
=;
(178)2000÷
=2000÷
=2000×
=.
(179)
(+++)×(+++)﹣(++++)×(++)
设x=++,那么:
原式=(+x)×(x+)﹣(++x)×x,
=x++x
2
+x﹣x﹣x
2

=x﹣x+,
=.

(180),
=,
=,
=,
=1.




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