小学分数方程专项练习180题

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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)

(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)x x=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=

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