小学的分数方程专项练习180题

1、实用标准文案分数方程专项练习180题（有答案）(6 )2X+1=2x+=3 2 3(2)(7 )+2x,42精彩文档(3) 2x+L=42,3 2(8 ) 12+ ( x+1) =1.2 ,4工,10 4.5(9 ),、.7 7(5) 5x- 3X =-,10 5(10 )3_94-5(11) JXx 2=4X5,3(16 ) X : X=1,510(12 ) X- 2x或3 9(17 )x+ x=423 2(13 ) 90xL2x=20,6 2(18 )(14 ) 0.2x+,=8 -5(19 )2x+l二1,(15 )X+ (3X- 16) + 工=10 (X+1),4(20 )52X+1

2、 =2812'(15 )(21)10112x=3(22 ) x+2一=4.2512(28 ) L+2x=121 ,4 3(23 ) x- ( lZ+工)=4.53 6(29 ) (x+.§) X 7=8.1 ,7(24 ) 37.5+x=6952(30 )=3.6 1.2(31) 4x+l=5,(26 ) -x=2.4 X 5,、4(32 ) -+x=9,(27 )x +=-10 5 3(33 )(34 ) .?x+_?x=11 ,7 4(40 ) _1+x=Ji,4 4 2(35 ) 2x+至=4.625 ,8(41) Jx+5X4=955(36 ) W-2X=1,54(4

3、2 ) x - -x=3 9(37 ) x lx=2,9;，(38 )1Q3+21.5= -x,29(44 ) x - -x=0.2 ,67(39 )7-3x=116'(45 )(45 )(51) 7x-3x=M,15(46 )苣X3+2.75x=U,23(52 )1+ ；-三3x+ 一g 4 24（47）洋厂等，8,(53 )2J4X 2,(48 ) 5x-3X_L=J,10 5(54 ) 2. 4-23.2r ,2、319)弓X 3+2, 75X5(50 ) x+ x=398(55 )5x =344(56 )JLx -，X 6=1054(62 )x-三=2_迎(57 )_x+1.2

4、x=25(63 )"二=2.5(58 )8 - 4.5x二世,(64 )(59 )0.95 X 4=8.5 ,(65 )2x 1 = 352 4(60 )2x (66 )x-25 10(61)(67 )55'(69 )(70 )(68 )1.25: 0.25=iL,1.6(71) 1 - Jx=-?,4 512 5(72 ) x+-x=-,2 3 6、2 1(73 ) -x+-x=42,3 2(74 ) x+0.25=l,4(75 ) lx=10xl, 34(76 )卫 x+x=2,4 24(77 ) xX ( 1 - 37.5% )旦8(78 ) (x+2)=2,42(79

5、 )-x=50X510'(80 ) .?x+_x=42 ,3 2(86 ) 3 x =42X 257(81) 4+x=102,5(82 )(88 ) 1 +i=1,4 2(83 ) X. -X=-l,816(89 ) 3x-Zx_=50%3 2(84 ) (1557)X), 100891 Q(90 ) 3x-x=,4 19(85) X-1z= I(91)+x=10'(92 )3 _ x- 6 * 3一 X人一,57 10(93)x=0.8 ,25(99) lx- 6=7,2(94)卫X+5X495,(100) 2+5X=110,2(95) x-J*x-4=18,4(101) l

6、x-4=60,3(96)(102) -x - -x=9 ,25(97)xX =4,5(103) x - -x=3.6 ,4(104 ) x= 47(110)马-2 24, 35”外(111)1+3x=W,(106 ) 4 (&x)=%55(112 )s =31.2 4(105 ) 2=9.1 ,7(113 ) 2x1-X1, 5 25(107 )，X0.25+L=±52 45 (114) x-=30,12 5(108 ) -x+-x=-,2 3 6（109）睛吟3(115 )一区x=7,5s 4(116 ) JLx=,xi0,11 5(122 )2893*97(117 ) X

7、- ：X=6,51123)3+2. 75尸号,(118 ) X 2=13,S(124 ) X-1X=l,5 S(119) (1 - 1) X=480,9(125 ) 6X+4.5=；2(120) 6X+ X=39,(126) 80%X- 0.6=4.2 ,、3(121) 2.4 彳=3.2 x,317(127 ) 上X+X,5 10 9(128 ) 2x+也X=1Z, 7 8 28(134 ) 1X+UX8,8 2 2(129 ) _?L+x=H,1003(134 ) 3l 6亳g.25.(130) x-A=42,14(131) x+_=-，,8 5 20(136 )_ 3(137 ) 2X+

8、 =1,(133 ) X+ X=3,2 33 5 138 X+ -=, 4 6(139 ) lx -工X=1.5,23(145 ) 3至-4x=2,66(140) Ux理x=28X 型,20 1717(146)6 =26- 13 .x = 335 45 25(141) (x+3) X 1=48,2(147)=1+a25 7 25 35(142 ) x-厘=±4 8(148) X- 25%X=135(143 )X 8(149 ) -X- 12.5 X4=0,、3(144 ) 21+x=2,3 13(150) -x+-x-=1,4 2 4(i5i)x x( E - 2)=2,4 3 3(

9、157) 3 (X-l) J,43 8(152 ) 8x2 - 1.5x=1.1 ,4(158 ) X+X= X 1,3 4 5 4(153)卫x -且x=2,44(159 )工-x,62(154 ) x -=, 43 3(160) x+0.75 -？=0.15 ,5.3 .(155 ) x-x=15,_ 5_(161) 2x+-=4.625 ,(156 )x. 6.3x=,7 7(162 ) 21 + 4.8x=15.8 ,(163 )与遥x=14,2 3(168 ) xx (f-2) =?4 33(164 ) x+2x=2.1 ,4(169 ) 2/l+x=521520(165) 2.7

10、+ 120%x=9,(170) 4x-W=27 7(171) x-=4 5(166 ) (13-X) X =6=6, 4一 5(172 ) x - -x=3 8(167 ) x - 21 X -=4103(168 )1 x+ x= 15 5 15,、1 4(173 ) 6x- 3.5x=- -5 15(174 )至-3X184(180)x=15 25(181) 'x+15=407(176 ) 5X- 3X10 5(182 )xx 5 23(177 ) xxlx,?=53 55(178 )6923(179) * + x= T74(2) X- 2=旦7 9X - +=+Z,7 7 9 7X

11、= 幽；63(3) Zx+x=42,3 2,7 1、 八(+) x=42 ,3 2x=42,6xX _§=42X_§,677x=36;(4)'='10 4.54.5x=8,4.5x +4.5=8 +4.5 ,(8) 12+ ( x+工)=1.2 ,412+ (x+工)X ( x+1) =1.2 X (x+工),4441.2 X (x+1) =12,41.2 X(5) 5x- 3X 岂=工10 521-11055xLL 75x = 5= 4- 5,x=0.72X+1. 1=2_ 1x+ =3 2 2 3 22X=1x=3 6x=(7)+2x=',42-

12、+2x -=-x+(x+1) + 1.2=12 + 1.2 , 4x=938X-了 xJ40 22xx=+ 2+2,4Ux+U=4 + U4040 如160x=;17(10) 3x-x-5 4 53x-10 53x- A+_1=J+A,10 10 5 103x21-3=- 3,10410(11) 2XX 2=4X5,3X=20,343 _ 3XX =20 X ,3 44X=15(12) X-1X*,3 92、2(1-W) X±,39lx,2x=,3 912-XX 3=x 3,39(13) 90 X l+lx=20 ,6 215+x=20,215+ .lx - 15=20- 15,22

13、X=2-X=1,2-XX 2=1X2,lxX2=5X 2,2(17) .?x+x=423 2x=10(14) 0.2x+§=8 -5(.?+_1) x=423 2-x=426x=4240.2x+ :+5Be S H±x=8 - _x+x,x=361.8x+：二8'(18)141546*3.-4 4c1.8x+ =8 5 51.8x=7.214154141.8x +1.8=7.215512二;二:x=4(15) X+ (3X- 16) +4=10(X+1),4X+ (3X- 16) X4=10X+10,立二12 15 35 .3X+12X13X13X-64=10X+1

14、0,-64=10X+10,64+64=10X+10+64,512x=13X=10X+7412区 5，-5二3- 5二一 -,12 5 12362513X10X=10X+74 10X,3X=74(19)2x+l x- 13XX=+ 3=74+3,74332x+l l 1 324x+2二1,)x 6=1X6,-3x+3=6,4,1(15) - - 2k=W334, 1 .- -2x+2x=+2x,33x+5=6x+5x=1(20)5=6 5,-+2x=-3+2x32X+1 ,8_ E _ 12X+1 =2,S 1215cl 1 5-.I =2 - - .8 1232X2x=12x+ 2=1 + 2

15、,X=+ 2= + 2,2411x=0.543(16)占X- -X=1,51043(-)X=1,5 10(21)11x=4810 2 11 3x=x=33 33空33IxX 6=12X6,6x=72;(22) x+21=4.2512x=4.25- 2_L12x=4- 21212x=3-2_1212,2x=1;3(23) x-( 1 + ) =4.53 6, 4 1、x - ( 1+) =4.56 6x - 1 =4.56qx=4.5+1-6x=4+1 '2 6x=4二+126 6(27) x _L+l=J,10 5 3x -x=,2 3x2 2 3x=二(28) lx+-？x=121

16、,4 3-Hx=121 ,1212i2x ir11 iix=132(29) (x+写 X 7=8.1 ,77x+6=8.17x+6- 6=8.1 -6,7x +7=2.1 +7,x=0.3;(30)3.6 1.23.6X3.6=5172x 3.6x=15(24) 37.5+ l+x=69-l5237.5+0.2+x=69.537.7+x=69.5 x=69.5 37.7x=31.8(25)I _ 与二2，上一1 二 2，64x-1+1=2+1,6与 XQ3X6,6x=18(26) -x=2.4 X 5,6(31) 4x+l=5, 94xx=4x+(32)，+x=9,5+x444，J=9-fx=

17、415'(33),x-6&=N 6 6_x=_6 6Ixx 6=_x 6,48x+11=14,48x+11- 11=14- 11,48x=36x=5(34)卫x+2x=11,7 4雪=11,2828x=.?§=11 x3328(35) 2x+±!=4.625848x+48=3+48,(40)x=161 + 3X=1+ x=23x+1=23x+13x=13x +3=1 + 3,x=(41) Jx+5X4=9552x+ s2x=4-i=4.625sx=2-x+20=9553-x=95 - 205(36) §54 c c2x+2x52X=,4=+2x4

18、4,二 752x=x=(37) x-x=(38 )x=75=2x,20x=125一20'1140'x=2, gx=2,9=2x2,S 3+21.5= -x, 2922=228，区8 9x=99(42) x-x=3 9x=7（43遍3x+3x+11”一正+3x=+3x,1611J16 Sil=t- n 16 s 16'3x=3x+ 3=161+ 3,x=7（39）弓 o1614-48x=11 ,(44) x - -x=0.2 ,67(。-。)x=0.2 ,6 7,x=0.2 ,42x=8.4;(45) y - 4 y=18,4J1y 4=18 ,4y - 4+4=18+4

19、,4x= 10(49)至x=39 6显 x 2=E xE, 95 6 5x=1.5;ly 二4=22 -1, 4 F 41 4y=88(46)3+2.75x= U,23+2.75x=二23+2.75x -=-,22 3 22.75x=-62.75x-2.75= -2.75 , 片 一(50) x+2x=39,8U?x=39,8绥 x JL=39xJL,81313x=24;(51) 7x - 3x=,154x=-,154x+ 4= + 4,15x= ' x15(52) -x+-=,8 4 245.3 3 23 3 x+=8 4 4 24 45 - 5x=(53) 乂5西工34 2(47)

20、 5. 6K -m二4. 8，55x=4.8,5x +5=4.8+5,x=0.96;T)x=上5 427 1一x二一,20 2x+j=U3,2020 2 20_ 八 775x 3X，=,10 55x21J10 521 21_7 21+= +10 10 5 105x=10'5x+5=越+ 5,10x-111x= 73(54) 2.4-尹,2-工，0.9+x=3.2- x+x,0.9+x- 0.9=3.2 - 0.9 ,x=2.3;319(54) -X3+2.4.5+2.75x 4.5=.4.5 ,32.75x=1 至，62.75x+2.75=1 至二 2.75 ,6x=二3(55) 5x

21、-幺=3445x- -J+J?=34+J?4 445x=34 二45x + 5=34 J- 54x=6.95;(59)当-0.95 X 4=8.5 ,4Ex-3.8=8.5 ,4Jx- 3.8+3.8=8.5+3.842x=12.3 , 4-x-=12.3 444x=16.4;(60) 2x-211=2+21l, 22(2x 一2±1) x2=(2+ii) X 2,22(56)343x - -x 6=-1054x- x- 1=4+x+1,3x - 1=x+5,3x- 1+1=x+5+1,3x=x+6,3x x=x+6 x,w4.8=1Wx-4.8+4.8=e+4.81042x=6,2

22、x + 2=6+ 2, x=3(61)x=5.5510x=33 c cc 3上x+ =5.55 + 101010x=18.5(57) 3*+1.2x=25(62) xX-l=2.X+2一2(屋+1.2 ) x=25,5利-Wx，5x=255x+ 5=25+5,x=52x+-ix=- - -lx+x,3 3(58) 8- 4.5x=仪,2x1=42-38 - 4.5x+4.5x= 3乱+4.5x ,*6'. -+4.5x=8 ,3T+4.故一破=8-破,x=14.5x=4.5（63）警 =2.5 ,4)X 12=2.5 X 12,4.5x+4.5=4.5 +4.5 ,x=14x+8- 3

23、x+9=30,x+17=30x+1717=30- 17,x=13(70) 1.25 : 0.25=(64) Zx=18,30.25x=1.25*，1.6X1.6 ,0.25x=2Zx+ J=18 + W,330.25x+ 0.25=2 + 0.25 ,3x=27x=8(65) -x - 1=-,52 42X- 1+L3+1x 一+,一十一, 52 2 4 2(71) 1 -当=包,4 51 . 3X+ 3x=3 + 3Ix+x= 十- x4 4 5 4_x= J5 4x-= =一55 4x=%-x+-=1,4 53x+3_ 3_1.3x+14 5 553 2x=,4 5(66)二 x= r ,

24、5 10lx=±,5 10，Q 1= 十一、5 10 53x- 3=2- 3-x 一一 44 5 4x= X -x= ,15(72) _1x+ZxW,2 3 67 5x=(67) xx=6 6J.5 J=十一6 6 6'x=1x=1(73) 2x+x=42,3 2(68) l=：, 3 3(+1) x=42 ,3 27 cx=42 ,6,7 C£-x X -=42 X -73 3 3'x=36x=2,、13(69) x - -x=,4 S上；-x=,4 S(74) x+0.25=-,4x+0.25=0.25,x+0.25 0.25=0.25 0.25 ,x=

25、3 3 3= ,4 8 41x=0(75) -x=10X-,34152xx 3=-X 3,322(76) Jx+lx=21,4 24(第4)x=21,_x=42,6_IxX.=42X_§,677x=36;；x=2444(81) 4+lx=102,5-xX44+lx-4=102-4,5x=J.5(77)xX ( 1 37.5%) ”,80.625x=x=98,5IxX 5=98X 5,5x=490;X=；'(82)工xdxC2 3 4x=17x .工二.-6 . 6 4 . 69x= ;10(78) - (x+1)42=2,(83) - - X=816'lx+lx-l=

26、2,4 4 2-X+x=-+x,L+L-4 S 21 ,11 11x+ =4 88 28；16- =|H+x'1./x=16'x=1, 3 ,±xX4=Xx 4,481(84) (1X,100845x100100x=145100'1713(79)9x=50X±,5101 dcx=15,5(85) x*='18-xX 5=15X5,5x=75;,、9 1(80) x+上x=42 ,3 22 1 (-+-) x=42,3 23（86）谓 bX =3；5=423,-X +E=42X557 5x =42x Jx 旦7 3X =50;=-_l_=_?_

27、+x -il,5 35 3535x=1235(87) 8x-1x3=查，448x -1查，4 48x2+2=1+4 4 4 48x=12,8x +8=12 + 8,x=1.5(93) _l-x=0.8 ,254 一 4、，+ x x x= x x,255；x= Ix=5 25(88) -+-=1,4 2x+2=4,x+2- 2=4-2,x=2;(89) 3x-£x%0%3 2.x5x=x=3x3x至+至=4+也,3 3 2 33x=2,63x+ 3=3,6x=Y318(90) 3x - -x=,4 199X=18 x4 19-xx 生49 19 9x=819,、3(91) +x=51

28、0'3,3 73+x -=- ,55 10 5x=1Hi36x=x1。'9x+x=+x,35XV =)5 25.4. 4 . 4丁一 十一，5 25 5“、3八(94) -x+5X4=95,5Ex+20=95,5±x+20 - 20=95 - 20,5x=75,5x-=75-,5x=75x=125(95) x-x-4=18,4(1 -岂)x-4+4=18-4,4x=14,4工xx 4=14X4,4x=56-xXx=-x x,82-x X 2=- X 2,28x=； 4(97) xxW=4,5x X W+ 冬4 +5 55x=5;乜x +包=3.6工乜,44- 4x=4

29、.8;(98) -x J,772x X _I=_?X I,73 7 3x=3;(99) lx26=7,lx - 6+6=7+6,2-x =13,2lx X 2=13X 2,2x=26(100) -+5x=110,2(104)苫+ x=247至 + x x x= x x,47至工"x-Z xx 、4 , 7 77x=4;8(105) 2=9.1 ,7Ex 7=9.1 X7,7x=63.7;(106) 4 (，+x)55_+4x=55l§+4x- A=,55 554x=4,x=1;x+10x=220,11x=220,11x+11=220 + 11,(107) &X5i

30、30.25+ x=-2 4x=200.2+(101) lx - 4=60,30.2+132x- 0.2=-k x31x34+4=60+4,x=x=192：x=1(102) Ax-2x=9,5(108) 4+4=之2 3 6x=9,1033x -=91010x=30二且, 10x=(103) x - -x=3.6 ,43=3.6 ,466 '6'x=(- - A) x=7,5 4_Lx=7, 20(110)_?_xX&=7X 理,20x=20T=24 xx=90(116) JL11x=Wx 10,5-x=8,11JLxxH=8X_ll,(111) l+3x=-,2811

31、sx=11l+3x- 2=百-1,S 2(117) X-X=6,53x=3x工S3=- 3,8222±X+ ±=6+±,5x=X=1524(112)(118) 2X-2=13,84x=3 X4x=3.64x + 4=3.6+ 4,x=0.9-X- 2+2=13+2,83 -X=15, S333X- -=15-,8 88X=401-x=-1,55X+X= +X,55+X=+X=-,55(119)(1 ()X=480,o'X=480,9X=0X=5405(114) x-=30,x -x -=30x-,6 66(120) 6X+|x=39,x=2531(115)

32、个 yx=7,6.5X=39,6.5X +6.5=39+6.5,X=63(121) 2.4 -=3.2 - x,0.9=3.2x,0.9+x=3.2- x+x,0.9+x=3.20.9+x - 0.9=3.2 - 0.9 , x=2.3;10 9(122)28 孚 “ 93*97_Lxx 1P=_Ix1P,107 9 7x=7,3&x-&=733- 3(128) 2x+x=!Z,7 S 2S、xJ, 56 28(123)-1x 3+2. 75i=-y?-+2.75x=,239 IQ 9-+2.75x - -=t-22 3 22.75x=11,62.75x+ 2.75=-2.75

33、 ,6Y- 2x=3(124) X-ix=l,5 8旦x+&JZ+母56 56 28 56x= _3(129) _?L+x=，1003x=x=x=一、IM(125) 6X+4.5= ,26X+4.5 4.5=4 4.5 ,26X=2,6X + 6=2+ 6,(126) 80%X- 0.6=4.2 ,0.8X- 0.6+0.6=4.2+0.6 ,0.8X=4.8,0.8X+ 0.8=4.8 + 0.8 ,X=6;(127) Wx+X,5 10 g100 3(130) x - A=42, 14x=42 X 卫14x=9;(131) .x+=,8 5 205x+l_l=19_lx+=g 5

34、5 20 55*=3-x一一 ,S 4(132)x=1(133) X+ X=3,实用标准文案x=14 6精彩文档=x _二=3 一工6 , 63.一,5x=3X +2S xE ,4 4 6 45x= -X;8(134)X+_!=_!x8,S 2 2(139) lx-工X=1.5 ,23X+1 - 2=4 -1,S 2 22-X=sl,82(1-1) X=1.5,2 3工 X=1.5 ,6-X - _1=31 _ :8 ' 8 2 - 3 x=4Ixx 6=1.5 X6, 6X=9(134) 3l6亳& 25,3x-6 +6 =8.25+6 ,443x=153x3=15+3,x=

35、5 S 11(135) 勺氐二 45X(+) x=15, 4 2x x £=15 x J,455x=12(136)7.5+7.5= 1+7.5 ,3.75 ,x=2.75(137) 2X+2=1, 432X+ 士-4I"?2x=2xx=+ 2+ 2,41京(138)3 5X+ =-(140)2Z x 20 17x=32(141) (x+3)0.5x+1.5=48x=28Xa,17-=48, 20.5x+1.5 - 1.5=48 - 1.5 ,0.5x=46.50.5x X 2=46.5 X 2,x=93(142) x-3x= 34 83xX £3 # 4 x&qu

36、ot;=-43 8 3x=8 3x=0.5;(143)3. 2 55x=3.25x=25.6飞'X8,5x +5=25.6+5, x=5.12(144)一+ x X x=2 X x,43y32=2x+ 2,4实用标准文案精彩文档(145) 3百-4x=2下,3 -4x+4x=2 至+4x,c E c R c 6J3 - 2-=2-+4x- 2-,66 661=4x1+4=4x+4,x=0.2535 45 256.10335 9!x=3x 理3 35"二x=(147)型+工二25 7 25 35凡 3y=49 x=»",25 7 30；x=L '1 x=25 30x=；25 30 7&