小学总复习解方程专项练习200题有答案K1.docx
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1、 解方程专项练习200题(有答案)解方程专项练习200题(有答案)(1)x=, (2) x=, (3) 4x=,(4) 82.52x=13.6 (5) 0.78:x=3:5, (6)120%x=0.4, (8) 1(x)=6,(9)2xx=1.2, (10)931.7x=13.4, (11)x25%x=24, (12)x+0.2=,(13)0.6x+90%x=78, (14)20%x2.43=0.8, (15)xx=42, (16)0.6x+32.5=67.5, (17)1(x0.45)=5,(18)x2.25=8.25, (19):x=3:12, (20)x+0.8=5.6, (21) 1.
2、4:x=1:0.75, (22) x(2)=24, (23) 4x=3,(24)12x+70.3=20.1, (25)x+x=, (26)x:42=, (27)0.5+x=, (28)0.8:=0.48:x, (29)=, (30)42:=:(31)5x0.4=75%,( 32) 6x0.9=4.5, (33)2(x3)=5.8,(34) 1.6x=6.4,(35) 4x39=29, (36)16+8x=40,(37) x1.1=3,(38)+2x=,(39)37x=1.04, (40)x1x=2, (41)xx=14,(42)3xx=,(43)=, (44)1.2:=,(45)=:,(46)
3、:=x:0.8,(47)x=+1,(48)125%X+25%x=+25%x,(49)=, (50)X=,(51) 5:8=x:32, (52)2x+30.9=24.9, (53)5.3x2.9x=,(54)(72.8x)=1.5,(55)x:0.3=:,(56) 150%x+66=99 (57)x+60.8x=16 (58) (59) (60)3(X)=1.3(61)(X+0.5):2=(X4):,(62) X0.05=3.528,(63)2X46=80, (64)44.53X=6.38, (65)4X7.2=10,(66)11.5X+X=20, (67)3.812+15X=87.6, (68
4、)6X+5=17, (69)0.6(2.5+X)=4.2,(70):=X:, (71), (72)(73), (74)4(+x)=,(75)0.25+x=, (76)x, (77)200:6=x:, (78)4X=, (79)8(x2)=2(x+7), (80):18%=, (81)2x=, (82)x+x=46, (83):x=:, (84)=, (85)5(3x4)2(x1)=5(2x1) (86)=, (87)8(2X7)=5(X+13), (88)3(x+4.5)=60, (89)1.6x+2.4=7.52, (90)3(x0.8)=6.3, (91)28.45x=5.8, (92)x
5、:= (93)+2x=,(94)x=15%,(95)xx=,(96)x+50%x=6, (97):x=0.3:12, (98)4x+2(8x)=26, (99)x=0,(100)+x=1,(101)x(+)=,(102),(103), (104)x,(105)x,(106)5x+35=650, (107)7203x=80,(108)3.6x0.9x=8.1, (109)44.53x=6, (110)=, (111)631.8X=7.2, (112)x=, (113)x=42, (114)x+=,(115)7x3=8.19, (116)12:0.6=x:, (117)3(x+2)=4(x+1),
6、 (118)3x70%x=9.2, (119) 6+x=240,(120)22.50.4x=12.5, (121)x:3.5=4:2, (122)x0.8x6=16, (123):=x:8,(124), (125)x:15=:,(126)x+x=,(127)x50%x=5, (128)1x=, (129)2.5+1x=3, (130)3x2=4,(131)8.53x=2, (132)3x=4, (133)x5%=17.54,(134):=:(4x), (135) 6x+31=49, (136) 7x3=8.19,(137) 32.89x=17.5, (138) x0.36x=16,(139)
7、67+3x=69, (140) 6x+2x56=0,(141) 3x0.454=2.7, (142) 5.8x4.6x=0.96, (143) 8.4(9x)=3, (144) 3x1.2=8, (145)5x+28=71, (146)8.71.2x=3.9,(147)8x2.6x=37.8, (148)0.75x0.954=8.5, (149)542+3x=72, (150)8x2.6=37.8,(151)x=,(152)x+30%x=26, (153) 7.83x=3.6, (154) 631.8x=7.2, (155)10:x=4.5:0.8, (156):=x:, (157)X7.65
8、=4.64,(158)28.25X=8.25, (159)X(3.6+2.97)=12.42, (160)x=, (161)14.5=5.5,(162)x80%x=48, (163)75%x5=6, (164)x6.8=15.4, (165)1.9x=5.7,(166)4.3yy=4.6, (167)5x+2.6=7.6,(168) x1.5=12.9, (169) 9x+5x=8.4, (170) 6.8+3.2x=14.8,(171)5x=, (172)x=,(173)4.53x=1.5, (174)(1+25%)x=0.5, (175)x40%x=9, (176)x20%=15.2,(1
9、78)xx=, (179)x75%=3,(180)4x, (181):x=:4.5, (182)(x4.5)6=12.5, (183)2717x=13.4, (184)9.6+3x=3.245,(185)2x+5=5x7, (186) 3(x2)=25(x2), (187)4x3(20x)+4=0, (188)=1,(189)4x56=12, (190)8x3x=15.6, (191)30(x4)=60,(192)7.20.53x=1.2, (193)5x2.45=8, (194)+x=2,(195)5x+2.415=66, (196)3.2x+2.8x-x=1, (197)2.516-8x=
10、12, (198)9.6-3x=6.3, (199)5(x+6)=75,(200)x0.7+0.93=4, 答案:(1)x=, =, , x=; (2) x=, x=, x21=21, x=12; (3) 4x=,4x+4x=+4x,=+4x, 4=4x4, x=(4) 82.52x=13.6 202x=13.6, 13.6+2X=20, 2X=6.4, x=3.2;(5) 0.78:x=3:5, 3x=0.785, 3x=3.9, x=1.3(6)120%x=0.4, 120%x+20%x=0.4+20%x, 0.4+20%x=1,0.4+20%x0.4=10.4, 20%x=0.6, 20
11、%x=0.6, x=3;(8) 1(x)=6,1(x)(x)=6(x), 1=6(x), 6x6=1, 6x3=1, 6x=4, 6x6=46, x=(9)2xx=1.2, x(2)=1.2, x=1.2, x=1.2, x=1;(10)931.7x=13.4, 271.7x=13.4, 271.7x+1.7x=13.4+1.7x, 13.4+1.7x=27,13.4+1.7x13.4=2713.4, 1.7x=13.6, 1.7x1.7=13.61.7, x=8(11)x25%x=24, 75%x=24, 75%x75%=2475%, x=32;(12)x+0.2=,x0.6=,x0.6+0
12、.6=+0.6,x=,x=, x=1(13)0.6x+90%x=78, 1.5x=78, 1.5x1.5=781.5, x=52; (14)20%x2.43=0.8, 20%x7.2=0.8, 20%x7.2+7.2=0.8+7.2, 20%x20%=820%, x=40;(15)xx=42, x=42, x=42, x=252(16)0.6x+32.5=67.5, 0.6x+7.5=67.5, 0.6x+7.57.5=67.57.5, 0.6x=60, 0.6x0.6=600.6, x=100; (17)1(x0.45)=5,(x0.45)(x0.45)=(x0.45), x2.4=1.6,
13、x2.4+2.4=1.6+2.4, x=4,x=4, x=(18)x2.25=8.25, x2.25+2.25=8.25+2.25, x=10.5;(19):x=3:12, 3x=12, 3x3=93, x=3(20)x+0.8=5.6, x+0.80.8=5.60.8, x=4.8, x=4.8, x=8(21) 1.4:x=1:0.75, x=1.40.75, x=1.05 (22) x(2)=24, x=24, x=24, x=20;(23) 4x=3,4x+=3+, 4x=4, 4x4=44, x=1(24)12x+70.3=20.1, 12x+2.1=20.1, 12x+2.12.1
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