小学总复习解方程专项练习200题有答案K1.doc
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1、第 17 页解方程专项练习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) 1.4:x=1:0.75
2、, (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):=x:0.8,(47)x=+1,(48)1
3、25%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)6X+5=17,(69)0.6(2.5+X)=4.2,(70):=
4、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:=(93)+2x=,(94)x=15%,(95)xx=,(96)x+50%x=6,(97):x=0.3:12
5、,(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),(118)3x70%x=9.2,(119) 6+x=240,(120)22.50.4x=12.5,(121)x:3.5=4:2,(122)
6、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) 67+3x=69,(140) 6x+2x56=0,(141) 3x0.454=2.7,(142) 5.8x4.6x=0.96,(143) 8.4(9x)=3,(144
7、) 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=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,(1
8、64)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,(178)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
9、) 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=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
10、, 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%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
11、.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+0.6=+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%=82
12、0%, 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,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
13、=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=20.12.1, 12x12=1812, x=1.5;(25)x+x=, x=, x, x=;(26)x:42=, 10x=42, 10x10=3010, x=3(27)0.5+x=, 0.75+x=3.75, 0.75+x0.75=3.750.75,
14、x=3, x=3, x=6;(28)0.8:=0.48:x, 0.8x=0.48, 0.8x=0.2, 0.8x0.8=0.20.8, x=(29)=, x=, x=, x=3;(30)42:=:x=42,x=30, x=50;(31)5x0.4=75%, 5x0.4+0.4=75%+0.4, 5x5=1.155, x=0.23( 32) 6x0.9=4.5, 6x0.9+0.9=4.5+0.9, 6x=5.4, 6x6=5.46, x=0.9;(33)2(x3)=5.8,2(x3)2=5.82 x3=2.9, x3+3=2.9+3, x=5.9;(34) 1.6x=6.4,1.6x1.6=6
15、.41.6, x=4;(35) 4x39=29, 4x27=29, 4x27+27=29+27, 4x=56, 4x4=564, x=14;(36)16+8x=40,16+8x16=4016, 8x=24, 8x8=248, x=3;(37) x1.1=3,x1.11.1=31.1, x=3.3(38)+2x=,+2x=, 2x=, 2x2=2, x=;(39)37x=1.04, 2.167x=1.04, 2.167x1.04=1.041.04, 1.127x=0, 7x7=1.127, x=0.16;(40)x1x=2, x1=2, x1+1=2+1, x=3, x=3, x=18;(41)
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