小学分数方程专项练习180题

1、百度文库分数方程专项练习180题（有答案）（1）+X=，(6 ix+il35(7 ) .l+2x=l, 42(3) 4+二x=42 ,3 2(8) 12+ (x+工)=1.2, 4(4)、q 2y 3 9(10) 3x - X=-5 4 5(11)&X2=45, 3(16 )(12 )(17 )(13 )90xl+ix=20,6 2,(14 )0.2x+工5(15 )(15 )91_x+x=423 2X+ (3X - 16 )=10 (X+1 ),4(18 )(19 )(20 )-.-=13(21)152x+l2X+1生=此8 1211=1 ，(22 )x+2一=4.2512(28 )_1x+

2、Nx=121 ,4 3(23 )x- ( 12+1) =4.53 6(29 )(24 )37.5+x=69-(25 )(26 )-ix=2.45,6(27 )x -(x+ ) 7=8.1 ,7(30 )(31)(32 )(33 )3.6 1.24x+=59I-(34 )(40 ) _!Sx=_l,4 4 2(35 )2x+且4.625,(41) Jx+5 4=95(36 )(42 ) x x3 9(37 )(38 )+21.5=-x, 29(44 )x=0.2(39 )-3x=1116g(45 y y4y=18,4(45 )(51)7x - 3x=2?,15(46 )二 3+2.75x=U(5

3、2 )(47 )(48 )7 75x - 3 =一10 5(49 )鼠-x=9(50 ) x+Xx=39,35y+3.23x =8 4 241 .1(53 )2(54 )(54 )|6=21054(62 ) x- X J- X + 223(57 x .一x+1.2x=25(63 )=2.5,(58 ) 8-4.5x=3-i,(64 ) Zx=18,3(59 ) -x- 0.95 4=8.5,4(65 )x-(60 ) 2x-il=2+il, 22(66 )-x= 1,xE ID(61)x+4x=4(68)X-咚(69 ) x - -lx=(70 ) 1.25: 0.25=L,1. &(71)

4、1 - x=, 同(72 )=x+&= -1，2 3 6(74 ) x+0.25=_k, 4(75 ) _!x=102，/34(76 ) Jx+ix=2-l, 4 24(77 ) xX (1 - 37.5%)旦s(78 ) 4(x)=2, 42(73 )上x+二 x=42(79 )x=505(80 )-x+Ax=42 ,2 2(86 )(81)4+lx=102,5(87 )8x (82 )1(83 )16(84 )55100(85 )(88 )(89 )(90 )(91)3x+1=1，昌50%,3 23x+x=510(92 )X=E 7 10(93 )4殳=0.8, 25(99 ) lx -6

5、=7,2(94 )3+5 4=95, 5(100) +5x=110,2(95 )(96 )(97 )(101)1X-4=60,3(102 )1xx=9,25xX=4,5(103) x-x=3.6,4(105 )(106 )(107 )(108 )(104 )4 (+x)=磐5541-0.25+x=62(111)1+3x=也,28(112 )-昌1.2 4(113 )-x=-,5 25-x+2(114) x圭=30,(109 )(116)_Lx=二M0, 11 5(122 )(117)(123 )(118)&-2=13, 8(119)(120)6X+ X=39 ,Z(121)31 q乙,-1X=

6、480 ,(124 )(125 )6X+4.5=(126)(127 )X X=8 g1380%X 0.6=4.2 ,X+5-Jx=i, 1 Cl 9(128 )S 28(134 )上x+工息8(129 )21十F1003(134 )(130)3x 二二42,14(131)(132 )(133 )-X+ X=33K - 6 亍& 25(135 )(137 )(138 )3 1-1(136 )-7.5=2X+=1,4(139 )lx -1x=1.5 , 23(145 ) 3. - 4x=226&(140)-X=28(146)Lg&W3 35 45 25(141)(x+3)(142 )(148) X

7、 -25%X=135 ,(143 )3.2 5. 一 ：(149 )1X - 12.54=0,(144 )(150)(151)xX (qW)=上,13 3(152 ) 8x1- 1.5x=1.1 , 4(153 ) 2x -lx=2 , 44(154 )旦x 一工2,43 |31155 ) x - -x=15, 8(157 )些(X 1)口438(158)1X+2x=上，/、3 41159 ) - x, 62(160) x+0.75 -上=0.15, 5(161) 2x+至=4.625, S(156 )Xf=3 X7 7(162 )F.8x=15.8 ,(163 )(164 )(165 )(1

8、66 )(167 )(168 )_lJx=14 , 2 3x+V=2.1 ,42.7T20%x=9 ,x - 21 起=41031 二 x+*,(168 )(169 )2+x=51520(13-X) 06,(170)(171)(172 )(173 )4x 一x上 = x4 57 Tx x=38I 4 6x 3.5x= I IS 15(174 )3X=(180)x=:15 25(175 )(176 )(177 )(178 )(179 )_ 58S -9s=l5(181)5X - 3 xLJ10 5x! X=53 5-x+15=40 n(182 )xy5 x =5 2E(1) +X=-27X-r.

9、 X=g(2) X-(8) 12+ (x+工)=1.2,4X=74 . J12+ (x+工)X (x+工)=1.2X (x+工)，4441.2 X (x+) =12,4(3) 2x+L=42 ,3 2(-+ ) x=42 ,3 21.2X (xJ) T.2=12T.24x+- -=10 -(4)x=42,x=x=36;xLIO- 84.5x=8,4.5x%.5=8%.5,x=16(5) 5x- 3乂17 75x 一10 521 jr10-5,5x-100 5 10(6)x=0.72.1121登+2 2 3 才x二一3x 62 2 12Tx _= 3x 3 & 3x=(7) -+2x=!:2xH

10、2=i &1x= 一 x咨7_5x5= 4- 5.17乜乩4 440 404。160x=17（10）3x+10 10 5 IT常,(11) 2X 2=4 53 4TX=20 ,X=152 2(12) X X=一,3 92(1 -T)2X=?3k =10 5(13) 90x1+二x=20,围215+4-x=20,215+x- 15=20- 15,2二xX2=52,2x=10 ;-X=1 , 2X 2=1 X2,2X=2;(17) Nx+1x=423 20.2x+41.8x=7.2,41.8x+=8 5(14) 0.2x+j8 - 1 居54 41.8x+ =8 一(二+-L) x=423 2x=

11、4267x=42 =6(18)x=3611 _ 1 _ 1 1 五一一前q1.8x7.8=7.2 7.8,x=4(15) X+ (3X 16)J=10 (X+1),4X+ (3X- 16)4=10X+10 ,X+12X -64=10X+10 ,13X 64=10X+10 ,53近嗦，55 3 512x 12 5 1213X -64+64=10X+10+64 ,x=13X=10X+74 ,13X - 10X=10X+74 T0X,3X=74 ,X=(19)当色y- L 32(在生 一工11) 6=13/264x+2 - 3x+3=6 , x+5=6 , x+5 5=6-5,日 一 2x+2x=E

12、+2x,x=1-+2x=-33W+2x-2x=1 ,2x笠=1 e,5(20) 2X+1=aS 1252X+1-82X登工1 -22X 24 ，11X=te(21) -x=113(22) x+2(23) x-x=-_ 二 x11=4.2512x=4.25 - 2-12x=4x=33122 1212izx=1 i=4.54 1x- ( 1+ -) =4.56/5x 1 =4.5x=4.5+1-3x=41+12 &x=4十+x=6 三;(24) 37.5+x=69-5 r37.5+0.2+x=69.537.7+x=69.5x=69.5 37.7x=31.8(25 )I -z-j-x- 1= 2 6

13、-K- 1+1=241 6Q 6=3X6(26) -lx=2.4X5,6工x6=12 6,6x=72 ;(27)(28)xW+lHix= x=1 2x+x=121(29) (x+3)X7=8.1 ,T(30)3. & 1. 2X3.6=/M.6,_L . u(31)(32)x=154x+=5g4x-4=4一+x=9二5 二a4x：114 _ 4 o_ 4一+x 丁 =9一1,5 5s41x= 57x+6- 6=8.1 -67x 月=2.1 月,x=0.3;57x+6=8.1 ,x=1837(33)生x- 6(39) A - 3x=H, 81&lx=x=&i5=xX6=- 6,66x=5;14-

14、 48x=11 ,48x+11=14 ,48x+11 - 11=14-11,48x=3,48x *8=3 *8,(34)当+A=11T 33釜=11 ,282g 333328x=F(35) 2x+且4.625a2x+ - =4.625 8 8x=2,2x=4,i=+2x - 4 4.x，2x=11x=(37)20?1140x - -x=29lH=2i_9x= I(38)二+21.5=x29x=99T3x+1=2 ,3x+1 - 1=2- 1 ,3x=1 ,3x3=1 创x/x 3(41) x+54=955,x+20=95-x=95 - 20x=755x=751x=125(42) x - -x,

15、3 92 _8x=-,3 T2 .28.2 Z -T x _3 9 314x-；11711-3 舛3x=+3x,g1G3x33x &争o 11 7 113x$编33x=,33x,47x=1165x 一=+10 10 5 10(44)二x-_lx=0.2,675x,10x=0.2 ,-x=0.2,42x=10x=8.4 ;(45) y-4-骂=18,4(49) x=-*,9 6y - 4=18,4y - 4+4=18+4,4x=1.5;(45)二-=22 =y=8828 49(50) xx=39,18x=39,oxx-=39x1313-x +x=24 ;(51) 7x - 3x=2S?x= 4；

16、31 q(46) 3+2.75x= 234x=j152.75S2.75x 34x%=n%x=15(47)22.75x=11(52)卫 x+q, 8 4 245 3 3 23 32.75x2.75=6275,2x=一x 3-x+Bx 4 4 24 41x;；35. 6x - -4.8，5(53) x25x=4.8 ,5x4=4.8 4, x=0.96;(57 12()x=2，(48)77 1 7-x=z 20 20 2 2010x= 7(54) 2, 4-&32-*20.9+x=3.2 x+x ,0.9+x-0.9=3.2-0.9,：;+4.5x=8x=2.3;4.5x=4.5 ,4.5x4.5

17、=4.54.5, x=1;194.5+2.75x 4.5=-34.5,2.75x=1 , ，(59)至x-0.954=8.5,42.75x2.75=1 H-2.75,(55 ) 5x-上=3445x +上=34+上-x- 3.8=8.5,43x - 3.8+3.8=8.5+3.8 ,43子 x=12.3,4x普=12.3 上，445x=344Z3 5x4=344 4x=6.95;(56 )且x-二106=10x 4.8=1433x-4.8+4.8=+4.8104x=5.55x=16.4;(60) 2x-il=2+il,2 F(2x-) 2= (2+八222 4x - x- 1=4+x+1 ,3

18、x -1=x+5,3x - 1+1=x+5+1 ,3x=x+6 ,3x x=x+6 x,2x=6,2x登=6妥，x=333x-=5.55-10 10x=18.54(57) 3-5x+1.2x=25(62)=21.2) x=25,x-x+-=22 2K+22于5x=25 ,5x4=25 芍,114 1x+=-2 2 3 3(58) 8- 4.5x=x,x+x=2 2 3 38 - 4.5x+4.5x= 3+4.5x5 1 _ 1 |4,x=6x 2 2 3(69) x - -x=,4 Sx=1(63) 12- * 3=2.5,34(主匕一 岂一)M2=2.5M2,344x+8 - 3x+9=30

19、 ,x+17=30 ,x+17- 17=30- 17,x=13(64) x=18,3当上=183，3 33x=27;x= x,2(70) 1.25: 0.25=L60.25x=1.25 M.6,0.25x=2 ,0.25x0.25=20.25,3 41- 2-二Tx石6(71) 1 -：；x=：；x=1x=x5=98 5 5x=(82)x=490 ;14喑x x=(78)1(x+ =) =2,42士+ 7 F,118= 21_1 1S= 2 Xx=x=32;i s(79)寺=50 榭(83)3 - x二. 8x=9 1。16, X+x=-+x立普+x-8 IS 16_ 3x=l&7帚 X二*4

20、5 . 45 7 . 45x -；=；.100100 8 1。0x=1n18x=-(91) _2+x=_!_510二+x 二一二55 10 5x=；10(86)里产42里5(92)2-x=d, 57 10产50;5 35 35935(87) 8x-A刈=里448x 3 458x (88)8x=12 , 8x3=12 3, x=1.5+1 ,4 2?区x=4 4x=5 25(89)(90)x+2=4 , x+2 2=4 2,x=2 ;3x-E 些=50%,3 23x-旦工3 23x 5 5 15+-=+3 3 2 3。133x=石3x3=工 x=：3xf= 1959 118K=l95 5125

21、时|1|x=5；3(94) x+5 4=95 ,5-x+20=95 ,5ex+20 - 20=95- 20, 51xi=75tx=75x=125 ;I(95) xx 4=18,449111至)x-4+4=18-4,4x=14,4x=192 ;-x4=144,4(102) x -1x=92 5x=56(96)1+X =3JX 1 3-x 1-x=9-x 双= 81010=9, 9 i Jx=30 ;1.1x=2x2=2(103) x-lx=3.6 ,4x=4(97) xX=4,557(98) Mx7x4金44x=5;x=3.6,(104)x=4.8 ;x=4春(99)1-X2-6+6=7+6 ,

22、(105) 3=9.1 , 7=9.1 77, 7-x =13,+X 2=13 2,2x=63.7 ;(106) 4i+x)=f+4x=5x=26(100)丛+5x=110,2+4x 4x=4 ,x+10x=220 ,11x=220,11x11=22011,x=20 ;A13(107) 0.25+x)52(101)5x-4=60,1 30.2+丁 ,-jx - 4+4=60+4 ,0.2+7：x 0.2=-一240.2,X=4055x=IA-X+X=_l+X5(108) _lx+4=W5电6+X=5= -x= 61+X+X51 1_1X=0(109)(114)x 圭=30,6x至巨=30也51

23、 _ 1 6石/一一一一x=25 ;(115 )x=l百(53)x=7(110)-|s-X=24102 2 2后xk6方，X=15 ;(118) X - 2=13X - 2+2=13+2 ,TX=15, 2S亍X=158 8(119) (1 X=480 ,-JX=532(125) 6X+4.5=1,26X+4.5 - 4.5工-4.5,26X=2 ,X=540(120) 6X+ -Lx=3926.5X=39 ,6.5X-6.5=39-6.5,X=6(121) 2.4-=3.2-x,20.9=3.2 x,0.9+x=3.2 x+x,0.9+x=3.2(126) 80%X - 0.6=4.2 ,0

24、.8X - 0.6+0.6=4.2+0.6 ,0.8X=4.8,0.8XR.8=4.8 田.8,X=6 ;(127) -X+50.9+x 0.9=3.2 0.9,(122)x=2.3 ;28 49 9 X-3 3 928 _73JLx-7-.X= ._X-iX(128)_X+-X=2SX X9El51X =56 58 23 552X=T(129)2110021 T2.75x2.75=-6275,x=!i而;x=-(124) X -1(130) x&_=42 ,14x=42ir4_1 S= .5X5(131)+8 5 2015,x. 一x一1119 山 一, 5 2C1 55 5_3 5x=5(

25、132) ,2X =1(136)7.5二二二一二 x 7.5+7.5= P.-+7.5,?3乂 3X54x=12x：4 4(137) 2X+$1, 44(133)2X+1x=32 3旦=3,61 dx=l.X?(138) X式甚4 6x=3一;571 1 1(134) -X+= Ua 2 2X8,-x+18 2TX_31-X=3 -fl 73(134)x=43k - 6-=8.25,(135)(139)5x二一.S?,3 333x- 6-+6-=8.25+6Jr4 443x=15,3x与=15与,x=5;(牙同x=1515 |4口号15后x=12(140)-X X6=1.5X6,6 j28x=

26、321&17(141) (x+3) i=48,20.5x+1.5=48 ,0.5x+1.5 1.5=48 - 1.5,0.5x=46.5 ,0.5x 2=46.5X2,x=93;57(142) x-3=4 8x , 2sn Tso-x=-x=47 25 30娉，4 3 8 318 49 3 I . =25 30 7x=x=1.35x=0.5 ;(148) X -25%X=135 ,0.75X=135 ,(143)3,2_5. 一 ：0.75X.75=135 田.75,X=180 ;5x=3.2X8,5x=25.6 ,5x5=25.6 4,(149)1X 12.54=0,5x=5.12(144)

27、 2工殳=2,42殳双=2 x, 4X 50=0,1X - 50+50=0+50 ,X=50 ,532-F2=2x2,4,1工X，=50，x=i;X=250(145) 3- 4x=2&4x+4x=2+4x,6吏一述， L3 2=2+4x 266 66(146)(147)(150)乎匿=1x+- =1 “1=4x ,=x+-41 -4=4x -4,x=0.25 ;(151)x=4.T小刍=上跖25 7 25 35(152)x=6；1 212x=3,告12=|必2,x=882 - 1.5x=1.1 ,42- 1.5x=1.1 ,2- 1.1 + 1.5x 1.5x=1.1 1.1+1.5x,1.5x=0.9,1.5x 勺.5=0.9 勺.5,65x=0.6;5x+x=+x,62(153) & -k=2 ,44l+x=5+x26x2=22,2x=4(154)3-x 4(160) x+0.75 T=0.15,x+0.75 =0.15+-, 5x+0.75=0.75 ,x+0.75 0.75=0.75 0.75,(155) x/x=15,8x=0;(161) 2x+W =4.625,s5-=4.625於158kXTL5X4x=22x及=4e,2x=4 ,工 丁(156) Xx=