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分数方程专项练习180 题(有答案)(1)+X=,(2)X=,(3)x+x=42 ,(4)=,(5)5x 3=,(6)x+=,(7)+2x=,(8)12 (x+)=1.2,(9)(10)精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 1 页,共 33 页(11)X 2=4 5, ,(12)XX=,(13)90 +x=20,(14)0.2x+=8x,(15)X+(3X16) =10( X+1) ,(15)=,(16)XX=1,(17)x+x=42 (18),(19)=1,(20)2X+1=2,(21)x=精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 2 页,共 33 页(22)x+2=4.25 (23)x( 1 +)=4.5 (24)37.5+x=69(25),(26)x=2.4 5,(27)x+=,(28)x+x=121,(29) (x+) 7=8.1,(30)=,(31)4x+=5,(32)+x=9,(33)xx=,精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 3 页,共 33 页(34)x+x=11,(35)2x+=4.625,(36)2X=,(37)xx=2,(38)+21.5=x,(39)3x=,(40)+x=,(41)x+5 4=95 (42)xx=(43) 3 =,(44)xx=0.2,(45) y4y=18,精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 4 页,共 33 页(45),(46) 3+2.75x=,(47),(48)5x3=,(49)x=,(50)x+x=39,(51)7x3x=,(52)x+=,(53)=,(54),(54),(55)5x=34 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 5 页,共 33 页(56)x 6=(57)x+1.2x=25 (58)8 4.5x=,(59)x0.95 4=8.5,(60)2x=2+,(61)x+x=,(62)x=2,(63)=2.5,(64)x=18,(65)x=,(66)xx=,(67),精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 6 页,共 33 页(68),(69)xx=,(70)1.25:0.25=,(71)1x=,(72)x+x=,(73)x+x=42,(74)x+0.25=,(75)x=10 ,(76)x+x=2,(77)x (137.5%)=,(78)( x+)=2,(79)x=50,精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 7 页,共 33 页(80)x+x=42,(81)4+x=102,(82)X+X=,(83)X=,(84) (1)X=,(85) =,(86) =42 ,(87)8x 3=,(88)+=1,(89)3x =50%,(90)3xx=,(91)+x=,精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 8 页,共 33 页(92)x=,(93) x=0.8,(94)x+5 4=95,(95)xx4=18,(96) =,(97)x =4,(98)=,(99) 6=7,(100)+5x=110,(101)x4=60,(102)xx=9,(103)xx=3.6,精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 9 页,共 33 页(104) x=(105)=9.1,(106)4(+x)=,(107) 0.25+x=,(108)x+x=,(109),(110),(111)+3x=,(112)=,(113) X=,(114)x =30,(115)x=7,精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 10 页,共 33 页(116)x= 10,(117)XX=6,(118)X2=13,(119) (1)X=480 ,(120)6X+X=39 ,(121)2.4=3.2x,(122),(123),(124)XX=,(125)6X+4.5=,(126)80%X0.6=4.2,(127)X+X=,精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 11 页,共 33 页(128)X+X=,(129) x=,(130)x=42,(131)x+=,(132)X=,(133)X+X=3,(134)X+= 8,(134),(135),(136)x7.5=,(137)2X+=1,(138)X =,精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 12 页,共 33 页(139)XX=1.5 ,(140)x=28,(141) (x+3) =48,(142)x=,(143),(144)2 x=2,(145)34x=2,(146)x=(147) x=(148)X25%X=135 ,(149)X12.5 4=0,(150)x+ =1,精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 13 页,共 33 页(151)x ()=,(152)8 1.5x=1.1,(153)xx=2,(154)x=,(155)xx=15,(156)X =,(157)(X)=,(158)X+X= ,(159)x=,(160)x+0.75=0.15,(161)2x+=4.625,(162) 4.8x=15.8,精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 14 页,共 33 页(163)x=14,(164)x+x=2.1,(165)2.7 120%x=9 ,(166) (13X) =6,(167)x 21 =4 (168)1x+x=(168)x ()=(169)2+x=5,(170)4x=;(171)x =(172)xx=3 (173)6x3.5x=精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 15 页,共 33 页(174)3X=(175)(176)5X3(177)x =5 (178) =,(179) + =,(180)x=(181)x+15=40 (182)x =专项练习参考答案:(1)+X=,+X =,X=;精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 16 页,共 33 页(2)X=,X+=+,X=;(3)x+x=42 ,(+)x=42 ,x=42,x =42 ,x=36;(4)=,4.5x=8,4.5x 4.5=8 4.5,x=(5)5x 3=,5x,5x,5x 5=,x=0.7 (6)x+=,x+=,x=,x = ,x=;(7)+2x=,+2x=,2x 2= 2,x=;(8)12 (x+)=1.2,12 (x+) (x+)=1.2 (x+) ,1.2 (x+) =12,1.2 ( x+) 1.2=12 1.2,x+=10,x=9(9)x=,x=4,x=;(10),3x+=+,3x 3= 3,(11)X 2=4 5, ,X=20 ,X =20 ,X=15(12)XX=,(1)X=,X=,X 3= 3,X=精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 17 页,共 33 页(13)90 +x=20,15+x=20,15+x15=20 15,x 2=5 2,x=10;(14)0.2x+=8x,0.2x+x=8x+x,1.8x+=8,1.8x+=8,1.8x=7.2,1.8x 1.8=7.2 1.8,x=4(15)X+(3X16) =10( X+1) ,X+ (3X16) 4=10X+10 ,X+12X 64=10X+10 ,13X64=10X+10 ,13X 64+64=10X+10+64 ,13X=10X+74 ,13X10X=10X+74 10X,3X=74,3X 3=74 3,X=(15)=,+2x=+2x,+2x=,+2x=,2x=1,2x 2=1 2,x=0.5(16)XX=1,()X=1,X=1,X 2=1 2,X=2;(17)x+x=42 (+)x=42 x=42 x=42x=36 (18),=,=,=,=,=,x=(19)=1,() 6=1 6,4x+23x+3=6,x+5=6 ,x+55=65,x=1(20)2X+1=2,2X+1=2,2X 2= 2,X=(21)x=x=精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 18 页,共 33 页x=x=;(22)x+2=4.25 x=4.252x=4 2x=3 2x=1;(23)x( 1 +)=4.5 x( 1 +) =4.5 x1=4.5 x=4.5+1x=4+1x=4+1x=6;(24)37.5+x=6937.5+0.2+x=69.5 37.7+x=69.5 x=69.537.7 x=31.8 (25),x=18(26)x=2.4 5,x 6=12 6,x=72 ;(27)x+=,x=,x=,x=(28)x+x=121,x=121,x=132;(29) (x+) 7=8.1,7x+6=8.1,7x+66=8.16,7x 7=2.1 7,x=0.3;(30)=, 3.6= 3.6,x=15 (31)4x+=5,4x+=5,4x 4=,x=;(32)+x=9,+x=9,x=;(33)xx=,精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 19 页,共 33 页x=,x 6= 6,x=5;(34)x+x=11,x=11,x=11,x=(35)2x+=4.625,2x+=4.625,2x=4,x=2,(36)2X=,2x+2x=+2x,=2x,2x=,x=,(37)xx=2,x=2,x =2 ,x=;(38)+21.5=x,22=x,22 =x x=(39)3x=,1448x=11,48x+11=14,48x+11 11=1411,48x=3,48x 48=3 48,x=;(40)+x=,3x+1=2,3x+1 1=21,3x=1 ,3x 3=1 3,x=;(41)x+5 4=95 x+20=95 x=9520 x=75 x=75x=125 (42)xx=,x=,x=,x=;(43) 3 =,3 +3x=+3x,3x+=,3x+=,3x=,3x 3= 3,x=(44)xx=0.2,精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 20 页,共 33 页()x=0.2,x=0.2,x=8.4;(45)y4y=18,y4=18,y4+4=18+4 ,y=22,y=88 (45),x= ,x=;(46) 3+2.75x=,+2.75x=,+2.75x=,2.75x=,2.75x 2.75= 2.75,x=;(47),5x=4.8,5x 5=4.8 5,x=0.96;(48)5x3=,5x=,5x+=+,5x=,5x 5= 5,x=(49)x=,x = ,x=1.5;(50)x+x=39,x=39,x=39,x=24 ;(51)7x3x=,4x=,4x 4= 4,x=(52)x+=,x+=,=,x=;(53)=,() x=,x=,x=,x=(54),0.9+x=3.2 x+x,0.9+x0.9=3.20.9,x=2.3;(54),精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 21 页,共 33 页4.5+2.75x4.5= 4.5,2.75x=1,2.75x 2.75=12.75,x=(55)5x=34 5x+=34+5x=345x 5=34 5 x=6.95;(56)x 6=x 4.8=x4.8+4.8=+4.8 x=5.55 x=5.55x=18.5(57)x+1.2x=25 (+1.2)x=25,5x=25,5x 5=25 5,x=5;(58)8 4.5x=,84.5x+4.5x=+4.5x,+4.5x=8 ,+4.5x=8,4.5x=4.5 ,4.5x 4.5=4.5 4.5,x=1;(59)x0.95 4=8.5,x3.8=8.5,x 3.8+3.8=8.5+3.8,x=12.3,x =12.3 ,x=16.4;(60)2x=2+,(2x) 2=(2+) 2,4x x1=4+x+1 ,3x1=x+5 ,3x 1+1=x+5+1 ,3x=x+6 ,3xx=x+6 x,2x=6,2x 2=6 2,x=3(61)x+x=,x=;(62)x=2,xx+=2x,x+=x,x+x=x+x,x=,x=,x=,x=1(63)=2.5,() 12=2.5 12,4x+8 3x+9=30,x+17=30,精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 22 页,共 33 页x+17 17=30 17,x=13 (64)x=18,x =18 ,x=27;(65)x=,x+=+,x=,x = ,x=;(66)xx=,x=,x = ,x=(67),x=1;(68),x=,x+=+,x=2(69)xx=,x=,x = ,x=;(70)1.25:0.25=,0.25x=1.25 1.6,0.25x=2,0.25x 0.25=2 0.25,x=8;(71)1x=,1x+x=+x,x+=1,x+=1,x=,x = ,x=;(72)x+x=,x=,x = ,x=(73)x+x=42,(+)x=42,x=42,x =42 ,x=36 ;(74)x+0.25=,x+0.25=0.25,x+0.25 0.25=0.250.25,x=0;(75)x=10 ,x 3= 3,精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 23 页,共 33 页x=;(76)x+x=2,(+)x=2,x=2,x = ,x=;(77)x (137.5%)=,0.625x=,x=,x = ,x=1;(78)(x+)=2,x+ =2,x+=,x+=,x=,x 4= 4,x=;(79)x=50,x=15,x 5=15 5,x=75;(80)x+x=42,(+)x=42,x=42,x =42 ,x=36;(81)4+x=102,4+x4=1024,x=98,x 5=98 5,x=490;(82)X+X=,x=,x=;(83)X=,X+x=+x,=+x,x=;(84) (1)X=,x=,x=1(85) =, =,= , =3;(86) =42 ,=42 ,精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 24 页,共 33 页 =42 , =50;(87)8x 3=,8x=,8x+=+,8x=12,8x 8=12 8,x=1.5 (88)+=1,x+2=4,x+22=42,x=2;(89)3x =50%,3x=,3x+=+,3x=,3x 3= 3,x=(90)3xx=,x=,x = ,x=(91)+x=,+x=,x=;(92)x=,x+x=+x,=+x,x=(93) x=0.8, x x= x,x=,x=,x = ,x=,x=;(94)x+5 4=95,x+20=95 ,x+20 20=95 20,x=75,x =75 ,x=75 ,x=125;(95)xx4=18,(1)x4+4=184,x=14,x 4=14 4,x=56(96) =, x x= x,x=,x 2= 2,精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 25 页,共 33 页x=;(97)x =4,x =4 ,x=5;(98)=, = ,x=3;(99) 6=7, 6+6=7+6,=13, 2=13 2,x=26(100)+5x=110,x+10x=220 ,11x=220,11x 11=220 11,x=20 ;(101)x4=60,x4+4=60+4 ,x=64,x=192;(102)xx=9,x=9,x=9,x=30;(103)xx=3.6,x=3.6,x =3.6,x=4.8;(104) x= x x= x,=x,x=4;(105)=9.1, 7=9.1 7,x=63.7;(106)4(+x)=,+4x=,+4x=,4x=4 ,x=1;(107) 0.25+x=,0.2+x=,0.2+x0.2=0.2,x=,x=(108)x+x=,x=,x,x=;(109),精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 26 页,共 33 页,x=;(110),x=90;(111)+3x=,+3x=,3x=,3x 3= 3,x=;(112)=,4x=3 1.2,4x=3.6,4x 4=3.6 4,x=0.9(113) X=,X=,X+X=+X,+X=,+X=,X=0 (114)x =30,x =30 ,x=25;(115)x=7,() x=7,x=7,x=7,x=20;(116)x= 10,x=8,x=8,x=11;(117)XX=6,X=6 ,X =6 ,X=15 ;(118)X2=13,X2+2=13+2 ,X=15 ,X =15 ,X=40 (119) (1)X=480 ,X=480 ,X =480 ,X=540 ;(120)6X+X=39 ,6.5X=39 ,6.5X 6.5=39 6.5,X=6(121)2.4=3.2x,0.9=3.2x,0.9+x=3.2x+x ,精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 27 页,共 33 页0.9+x=3.2 0.9+x0.9=3.20.9,x=2.3;(122),x=7,x=7,x=;(123),+2.75x=,+2.75x=,2.75x=,2.75x 2.75= 2.75,x=(124)XX=,X=,X = ,X=;(125)6X+4.5=,6X+4.5 4.5=4.5,6X=2 ,6X 6=2 6,X=(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)X+X=,X=,X=,X=(128)X+X=,X=,X=,X=(129) x=,x= ,x=;(130)x=42,x=42,x=9;(131)x+=,x+=,x=,x = ,x=(132)X=,X=,X=1,x=1;(133)X+X=3,x=3,精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 28 页,共 33 页x=3,x=3;(134)X+= 8,X+=4,X=3,X=3,x=4 (134),3x6+6=8.25+6,3x=15,3x 3=15 3,x=5;(135),(+)x=15,x =15 ,x=12(136)x7.5=,x7.5+7.5=+7.5,x=13.75,x=13.75,x=2.75(137)2X+=1,2X+=1,2x=,2x 2= 2,x=;(138)X =,X = ,x=;(139)XX=1.5 ,()X=1.5 ,X=1.5 ,X 6=1.5 6,X=9;(140)x=28,x=32;(141) (x+3) =48,0.5x+1.5=48,0.5x+1.51.5=481.5,0.5x=46.5,0.5x 2=46.5 2,x=93;(142)x=,x=,x =,x=,x=0.5;(143),5x=3.2 8,5x=25.6,5x 5=25.6 5,x=5.12 (144)2 x=2,2 x x=2 x,22=2x 2,x=1;精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 29 页,共 33 页(145)34x=2,3 4x+4x=2+4x,3 2=2+4x 2 ,1=4x ,1 4=4x 4,x=0.25;(146)x=x=,x=,x=,x=;(147) x= x=,x=,x= ,x=1(148)X25%X=135 ,0.75X=135 ,0.75X 0.75=135 0.75,X=180 ;(149)X12.5 4=0,X50=0,X50+50=0+50 ,X=50,X =50 ,X=250 (150)x+ =1,x+=1,x+,x,x=;(151)x () =,x=,x 12= 12,x=8(152)8 1.5x=1.1,21.5x=1.1,21.1+1.5x 1.5x=1.11.1+1.5x,1.5x=0.9,1.5x 1.5=0.9 1.5,x=0.6;(153)xx=2,x=2,x 2=2 2,x=4 (154)x=,x=,x=;(155)xx=15,x=24精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 30 页,共 33 页(156)X =,X = ,x=;(157)(X)=,(X)=,x,x=;(158)X+X= ,x=,x,x=(159)x=,x+x=+x,+x=,+x=,x=;(160)x+0.75=0.15,x+0.75+=0.15+,x+0.75=0.75,x+0.750.75=0.750.75,x=0;(161)2x+=4.625,2x+=4.625,2x=4,2x 2=4 2,x=2 (162) 4.8x=15.8, 4.8x 4.8x=15.8 4.8x,75.84x=,75.84x 75.84= 75.84,x=;(163)x=14,x=14 ,x=14,x=12(164)x+x=2.1,x=2.1,x =2.1 ,x=1.2;(165)2.7 120%x=9 ,2.7 1.2x 1.2x=9 1.2x,2.7=10.8x,2.7 10.8=10.8x 10.8,x=0.25;(166) (13X) =6,(13X) =6 ,13X+X=8+X ,138=8+X 8,X=5 (167)x21 =4 x 14=4x14+14=4+14 x=18x=60(168)1x+x=x=精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 31 页,共 33 页x=x=(168)x ()=x=x=x=8 (169)2+x=5,22+x=52,x=52,x=2;(170)4x=;4x+=+;4x=1,4x 4=1 4,x=(171)x =x =x=(172)xx=3 x=3 x =3x=8 (173)6x3.5x=2.5x=2.5x=0.75 2.5x 2.5=0.75 2.5 x=0.3 (174)3X=3X+3X=+3X =+3X =+3X=3X 3=3X 3 X=;(175)x=x =x=;(176)5X 35X2.1=5X2.1+2.1=+2.1 5X=3.5 5X 5=3.5 5 X=0.7;(177)x =5 x=5 x=5x=25 (178) =,=,x=;(179) + =,x=,精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 32 页,共 33 页x=,x=(180)x=x=x=1.8;(181)x+15=40 x+1515=4015 x=25 x =25x=35;(182)x =x =x=精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 33 页,共 33 页
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