六年級分數(shù)方程專項練習180[附答案解析]

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1、. . 26 / 26 分數(shù)方程專項練習180題(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, (

2、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=,

3、 (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)

4、, (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

5、=, (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)

6、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÷=, (

7、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

8、, (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÷=

9、 專項練習參考答案: (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=; (

10、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,

11、 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),

12、 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,

13、 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, 2

14、X+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

15、 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, ,

16、 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

17、)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, 48

18、x+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, 3

19、x+=, 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=

20、; (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,

21、 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+

22、 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

23、.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

24、÷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=,

25、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;

26、(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=; (7

27、7)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)

28、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 (8

29、8)+=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=,

30、 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×=×,

31、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=×

32、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;

33、 (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

34、×, 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,

35、 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=  (

36、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

37、+﹣=﹣, x=, x÷=÷, x= (132)X﹣=, X﹣=, X=1, x=1; (133)X+X=3, x=3, x=3, x=3; (134)X+=×8, X+=4﹣, X=3, X=3, x=4 (134), 3x﹣6+6=8.25+6, 3x=15, 3x÷3=15÷3, x=5; (135), (+)x=15, x×=15×, x

38、=12  (136)x﹣7.5=, x﹣7.5+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)X﹣X=1.5, (﹣)X=1.5, X=1.5, X×6=1.5×6, X=9; (140)x=28×, x=32; (141)(x+3)×=48

39、, 0.5x+1.5=48, 0.5x+1.5﹣1.5=48﹣1.5, 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; (

40、145)3﹣4x=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)X﹣25%X=135, 0.75X=135, 0.75X÷0.75=135÷0.75, X=180; (149)X﹣12.5

41、×4=0, X﹣50=0, X﹣50+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, 2﹣1.5x=1.1, 2﹣1.1+1.5x﹣1.5x=1.1﹣1.1+1.5x, 1.5x=0.9, 1.5x÷1.5=0.9÷1.5, x=0.6; (153)xx=2, x

42、=2, x×2=2×2, x=4 (154)x﹣=, x﹣=, , x=; (155)x﹣x=15, , , x=24  (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+

43、0.75﹣+=0.15+, x+0.75=0.75, x+0.75﹣0.75=0.75﹣0.75, 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,

44、 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)(13﹣X)×=6, (13﹣X)××=6×, 13﹣X+X=8+X, 13﹣8=8+X﹣8, X=5 (167)x﹣21×=4 x﹣14=4  x

45、﹣14+14=4+14 x=18 x=60. (168)1x+x= x= x= x=. (168)x×(﹣)= x×= x×= x=8 (169)2+x=5, 2﹣2+x=5﹣2, x=5﹣2, x=2; (170)4x﹣=; 4x﹣+=+; 4x=1, 4x÷4=1÷4, x=  (171)x÷= x÷×=×

46、 x= (172)x﹣x=3 x=3 x×=3× x=8 (173)6x﹣3.5x=÷ 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﹣3× 5X﹣2.1= 5X﹣2.1+2.1=+2.1 5X=3.5 5X÷5=3.5÷5 X=0.7; (177)x××=5 x=5 x=5 x=25 (178)χ=, χ=, x=; (179)χ+χ=, x=, x=, x=  (180)x= x÷=÷ x=1.8; (181)x+15=40 x+15﹣15=40﹣15 x=25 x÷=25÷ x=35; (182)x÷= x÷×=× x=

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