小学分数方程专项练习180题.docx
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小学分数方程专项练习180题.docx
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小学分数方程专项练习180题
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)
(11)X×2=4×5,,
(12)X﹣X=,
(13)90×+x=20,
(14)0、2x+=8﹣x,
(15)X+(3X﹣16)÷=10(X+1),
(15)=,
(16)X﹣X=1,
(17)x+x=42
(18),
(19)﹣=1,
(20)2X+1=2,
(21)﹣x=
(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)x﹣x=,
(34)x+x=11,
(35)2x+=4、625,
(36)﹣2X=,
(37)x﹣x=2,
(38)+21、5=x,
(39)﹣3x=,
(40)+x=,
(41)x+5×4=95
(42)x﹣x=
(43)﹣3χ=,
(44)x﹣x=0、2,
(45)y﹣4﹣y=18,
(45),
(46)×3+2、75x=,
(47),
(48)5x﹣3×=,
(49)x=,
(50)x+x=39,
(51)7x﹣3x=,
(52)x+=,
(53)﹣=,
(54),
(54),
(55)5x﹣=34
(56)x﹣×6=
(57)x+1、2x=25
(58)8﹣4、5x=,
(59)x﹣0、95×4=8、5,
(60)2x﹣=2+,
(61)x+x=,
(62)x﹣=2﹣,
(63)﹣=2、5,
(64)x=18,
(65)x﹣=,
(66)x﹣x=,
(67),
(68),
(69)x﹣x=,
(70)1、25:
0、25=,
(71)1﹣x=,
(72)x+x=,
(73)x+x=42,
(74)x+0、25=,
(75)x=10×,
(76)x+x=2,
(77)x×(1﹣37、5%)=,
(78)(x+)=2,
(79)x=50×,
(80)x+x=42,
(81)4+x=102,
(82)X+X=,
(83)X=,
(84)(1﹣)X=,
(85)χ﹣χ=,
(86)χ=42×,
(87)8x﹣×3=,
(88)+=1,
(89)3x﹣×=50%,
(90)3x﹣x=,
(91)+x=,
(92)﹣x=×,
(93)÷x=0、8,
(94)x+5×4=95,
(95)x﹣x﹣4=18,
(96)÷ⅹ=,
(97)x×=4,
(98)ⅹ=,
(99)ⅹ﹣6=7,
(100)+5x=110,
(101)x﹣4=60,
(102)x﹣x=9,
(103)x﹣x=3、6,
(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,
(116)x=×10,
(117)X﹣X=6,
(118)X﹣2=13,
(119)(1﹣)X=480,
(120)6X+X=39,
(121)2、4﹣=3、2﹣x,
(122),
(123),
(124)X﹣X=,
(125)6X+4、5=,
(126)80%X﹣0、6=4、2,
(127)X+X=,
(128)X+X=,
(129)÷x=,
(130)x÷=42,
(131)x+=,
(132)X﹣=,
(133)X+X=3,
(134)X+=×8,
(134),
(135),
(136)x﹣7、5=,
(137)2X+=1,
(138)X÷=,
(139)X﹣X=1、5,
(140)x=28×,
(141)(x+3)×=48,
(142)x﹣=,
(143),
(144)2÷x=2,
(145)3﹣4x=2,
(146)x÷=÷
(147)÷x=÷.
(148)X﹣25%X=135,
(149)X﹣12、5×4=0,
(150)x+×=1,
(151) x×(﹣)=,
(152)8×﹣1、5x=1、1,
(153)xx=2,
(154)x﹣=,
(155)x﹣x=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,
(163)x=14,
(164)x+x=2、1,
(165)2、7÷120%x=9,
(166)(13﹣X)×=6,
(167)x﹣21×=4
(168)1x+x=
(168)x×(﹣)=
(169)2+x=5,
(170)4x﹣=;
(171)x÷=
(172)x﹣x=3
(173)6x﹣3、5x=÷
(174)﹣3X=
(175)
(176)5X﹣3×
(177)x××=5
(178)χ=,
(179)χ+χ=,
(180)x=
(181)x+15=40
(182)x÷=
专项练习参考答案:
(1)+X=,
+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=;
(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,
(﹣)X=1,
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=﹣
x=﹣
x=;
(22)x+2=4、25
x=4、25﹣2
x=4﹣2
x=3﹣2
x=1;
(23)x﹣(1+)=4、5
x﹣(1+)=4、5
x﹣1=4、5
x=4、5+1
x=4+1
x=4+1
x=6;
(24)37、5++x=69
37、5+0、2+x=69、5
37、7+x=69、5
x=69、5﹣37、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+6﹣6=8、1﹣6,
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)x﹣x=,
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)x﹣x=2,
x=2,
x×=2×,
x=;
(38)+21、5=x,
22=x,
22×=x×.
x=
(39)﹣3x=,
14﹣48x=11,
48x+11=14,
48x+11﹣11=14﹣11,
48x=3,
48x÷48=3÷48,
x=;
(40)+x=,
3x+1=2,
3x+1﹣1=2﹣1,
3x=1,
3x÷3=1÷3,
x=;
(41)x+5×4=95
x+20=95
x=95﹣20
x=75
x=75÷
x=125
(42)x﹣x=,
x=,
x=,
x=;
(43)﹣3χ=,
﹣3χ+3x=+3x,
3x+=,
3x+=﹣,
3x=,
3x÷3=÷3,
x=
(44)x﹣x=0、2,
(﹣)x=0、2,
x=0、2,
x=8、4;
(45)y﹣4﹣y=18,
y﹣4=18,
y﹣4+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)5x﹣3×=,
5x﹣=,
5x﹣+=+,
5x=,
5x÷5=÷5,
x=.
(49)x=,
x×=×,
x=1、5;
(50)x+x=39,
x=39,
x×=39×,
x=24;
(51)7x﹣3x=,
4x=,
4x÷4=÷4,
x=
(52)x+=,
x+﹣=﹣,
=,
x=;
(53)﹣=,
(﹣)x=,
x=,
x÷=÷,
x=
(54),
0、9+x=3、2﹣x+x,
0、9+x﹣0、9=3、2﹣0、9,
x=2、3;
(54),
4、5+2、75x﹣4、5=﹣4、5,
2、75x=1,
2、75x÷2、75=12、75,
x=
(55)5x﹣=34
5x﹣+=34+
5x=34
5x÷5=34÷5
x=6、95;
(56)x﹣×6=
x﹣4、8=
x﹣4、8+4、8=+4、8
x=5、55
x÷=5、55÷
x=18、5
(57)x+1、2x=25
(+1、2)x=25,
5x=25,
5x÷5=25÷5,
x=5;
(58)8﹣4、5x=,
8﹣4、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)x﹣0、95×4=8、5,
x﹣3、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﹣x﹣1=4+x+1,
3x﹣1=x+5,
3x﹣1+1=x+5+1,
3x=x+6,
3x﹣x=x+6﹣x,
2x=6,
2x÷2=6÷2,
x=3
(61)x+x=,
x=;
(62)x﹣=2﹣,
x﹣x+=2﹣x﹣,
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,
x+17﹣17=30﹣17,
x=13
(64)x=18,
x÷=18÷,
x=27;
(65)x﹣=,
x﹣+=+,
x=,
x÷=÷,
x=;
(66)x﹣x=,
x=,
x÷=÷,
x=
(67),
x=1;
(68),
x﹣=,
x﹣+=+,
x=2
(69)x﹣x=,
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)1﹣x=,
1﹣x+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、25﹣0、25,
x=0;
(75)x=10×,
x×3=×3,
x=;
(76)x+x=2,
(+)x=2,
x=2,
x×=×,
x=;
(77)x×(1﹣37、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+x﹣4=102﹣4,
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)χ﹣χ=,
χ=,
χ÷=÷,
χ=3;
(86)χ=42×,
χ÷=42×÷,
χ=42××,
χ=50;
(87)8x﹣×3=,
8x﹣=,
8x﹣+=+,
8x=12,
8x÷8=12÷8,
x=1、5
(88)+=1,
x+2=4,
x+2﹣2=4﹣2,
x=2;
(89)3x﹣×=50%,
3x﹣=,
3x﹣+=+,
3x=,
3x÷3=÷3,
x=
(90)3x﹣x=,
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)x﹣x﹣4=18,
(1﹣)x﹣4+4=18﹣4,
x=14,
x×4=14×4,
x=56
(96)÷ⅹ=,
÷x×x=×x,
x=,
x×2=×2,
x=;
(97)x×=4,
x×÷=4÷,
x=5;
(98)ⅹ=,
ⅹ×=×,
x=3;
(99)ⅹ﹣6=7,
ⅹ﹣6+6=7+6,
ⅹ=13,
ⅹ×2=13×2,
x=26
(100)+5x=110,
x+10x=220,
11x=220,
11x÷11=220÷11,
x=20;
(101)x﹣4=60,
x﹣4+4=60+4,
x=64,
x=192;
(102)x﹣x=9,
x=9,
x=9,
x=30;
(103)x﹣x=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+x﹣0、2=﹣0、2,
x=,
x=
(108)x+x=,
x=,
x,
x=;
(109),
,
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)X﹣X=6,
X=6,
X÷=6÷,
X=15;
(118)X﹣2=13,
X﹣2+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、2﹣x,
0、9=3、2﹣x,
0、9+x=3、2﹣x+x,
0、9+x=3、2
0、9+x﹣0、9=3、2﹣0、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)X﹣X=,
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=
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部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
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