分数方程专项练习题有答案.docx
《分数方程专项练习题有答案.docx》由会员分享,可在线阅读,更多相关《分数方程专项练习题有答案.docx(61页珍藏版)》请在冰豆网上搜索。
分数方程专项练习题有答案
小学数学专项训练
分数方程专项练习180题(有答案)
(1)+X=,(6)x+=,
(2)X﹣=,(7)+2x=,
(3)x+x=42,(8)12÷(x+)=1.2,
(4)=,(9)
(5)5x﹣3×=,(10)
小学数学专项训练
(11)X×2=4×5,,(16)X﹣X=1,
(12)X﹣X=,(17)x+x=42
(13)90×+x=20,(18),
(14)0.2x+=8﹣x,(19)﹣=1,
(15)X+(3X﹣16)÷=10(X+1),(20)2X+1=2,
(15)=,(21)﹣x=
小学数学专项训练
(22)x+2=4.25(28)x+x=121,
(23)x﹣(1+)=4.5(29)(x+)×7=8.1,
(24)37.5++x=69(30)=,
(25),(31)4x+=5,
(26)x=2.4×5,(32)+x=9,
(27)x﹣+=,(33)x﹣x=,
小学数学专项训练
(34)x+x=11,(40)+x=,
(35)2x+=4.625,(41)x+5×4=95
(36)﹣2X=,(42)x﹣x=
(37)x﹣x=2,(43)﹣3χ=,
(38)+21.5=x,(44)x﹣x=0.2,
(39)﹣3x=,(45)y﹣4﹣y=18,
小学数学专项训练
(45),(51)7x﹣3x=,
(46)×3+2.75x=,(52)x+=,
(47),(53)﹣=,
(48)5x﹣3×=,(54),
(49)x=,(54),
(50)x+x=39,(55)5x﹣=34
小学数学专项训练
(56)x﹣×6=(62)x﹣=2﹣,
(57)x+1.2x=25(63)﹣=2.5,
(58)8﹣4.5x=,(64)x=18,
(59)x﹣0.95×4=8.5,(65)x﹣=,
(60)2x﹣=2+,(66)x﹣x=,
(61)x+x=,(67),
小学数学专项训练
(68),(74)x+0.25=,
(69)x﹣x=,(75)x=10×,
(70)1.25:
0.25=,(76)x+x=2,
(71)1﹣x=,(77)x×(1﹣37.5%)=,
(72)x+x=,(78)(x+)=2,
(73)x+x=42,(79)x=50×,
小学数学专项训练
(80)x+x=42,(86)χ=42×,
(81)4+x=102,(87)8x﹣×3=,
(82)X+X=,(88)+=1,
(83)X=,(89)3x﹣×=50%,
(84)(1﹣)X=,(90)3x﹣x=,
(85)χ﹣χ=,(91)+x=,
小学数学专项训练
(92)﹣x=×,
(98)ⅹ=,
(93)÷x=0.8,(99)ⅹ﹣6=7,
(94)x+5×4=95,(100)+5x=110,
(95)x﹣x﹣4=18,
(101)x﹣4=60,
(96)÷ⅹ=,(102)x﹣x=9,
(97)x×=4,(103)x﹣x=3.6,
小学数学专项训练
(104)÷x=(110),
(105)=9.1,(111)+3x=,
(106)4(+x)=,(112)=,
(107)×0.25+x=,(113)×﹣X=,
(108)x+x=,(114)x÷=30,
(109),(115)﹣x=7,
小学数学专项训练
(116)x=×10,(122),
(117)X﹣X=6,(123),
(118)X﹣2=13,(124)X﹣X=,
(119)(1﹣)X=480,(125)6X+4.5=,
(120)6X+X=39,(126)80%X﹣0.6=4.2,
(121)2.4﹣=3.2﹣x,(127)X+X=,
小学数学专项训练
(128)X+X=,(134)X+=×8,
(129)÷x=,(134),
(130)x÷=42,(135),
(131)x+=,(136)x﹣7.5=,
(132)X﹣=,(137)2X+=1,
(133)X+X=3,(138)X÷=,
(139)X﹣X=1.5,
(140)x=28×,
(141)(x+3)×=48,
(142)x﹣=,
(143),
小学数学专项训练
(145)3﹣4x=2,
(146)x÷=÷
(147)÷x=÷.
(148)X﹣25%X=135,
(149)X﹣12.5×4=0,
(144)2÷x=2,(150)x+×=1,
小学数学专项训练
(151)x×(﹣)=,
(157)(X﹣)=,
(152)8×﹣1.5x=1.1,(158)X+X=×,
(153)xx=2,(159)﹣x=,
(154)x﹣=,(160)x+0.75﹣=0.15,
(155)x﹣x=15,
(161)2x+
=4.625,
(156)X÷=,(162)÷4.8x=15.8,
小学数学专项训练
(163)x=14,(168)x×(﹣)=
(164)x+x=2.1,(169)2+x=5,
(165)2.7÷120%x=9,(170)4x﹣=;
(166)(13﹣X)×=6,
(171)x÷=
(167)x﹣21×=4(172)x﹣x=3
(168)1x+x=(173)6x﹣3.5x=÷
小学数学专项训练
(174)﹣3X=(180)x=
(175)(181)x+15=40
(176)5X﹣3×(182)x÷=
(177)x××=5
(178)χ=,
专项练习参考答案:
(1)+X=,
(179)χ+χ=,
+X﹣=﹣,
X=;
(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=;
小学数学专项训练
(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)X﹣X=,
(1﹣)X=,
X=,
X×3=×3,
X=
(13)90×+x=20,
15+x=20,
15+x﹣15=20﹣15,
x×2=5×2,
x=10;
(14)0.2x+=8﹣x,
0.2x++x=8﹣x+x,
1.8x+=8,
1.8x+﹣=8﹣,
1.8x=7.2,
1.8x÷1.8=7.2÷1.8,
x=4
(15)X+(3X﹣16)÷=10(X+1),
X+(3X﹣16)×4=10X+10,
X+12X﹣64=10X+10,
13X﹣64=10X+10,
13X﹣64+64=10X+10+64,
13X=10X+74,
13X﹣10X=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)X﹣X=1,
小学数学专项训练
X=1,
X×2=1×2,X=2;
(17)x+x=42
(+)x=42
x=42
x=42÷
x=36
(18),
=,
=,
=﹣,
=,
÷=÷,
x=
(19)﹣=1,
(﹣)×6=1×6,
4x+2﹣3x+3=6,
x+5=6,
x+5﹣5=6﹣5,
x=1
(20)2X+1=2,
2X+1=2,
2X÷2=÷2,
X=
(21)﹣x=
(﹣)X=1,x=﹣
x=﹣
x=;
(22)x+2=4.25x=4.25﹣2
x=4
﹣2
x=3
﹣2