1、(1)x(2)x 六年级解方程专项练习六年级解方程专项练习 200200 题(有答案)题(有答案)=,(9)2x x=1.2,(10)931.7x=13.4,=,(3)4x=,(4)82.52x=13.6(5)0.78:x=3:5,(6)120%x=0.4,(8)1(x)=6,11)x25%x=24,12)x+0.2=,13)0.6x+90%x=78,14)20%x2.43=0.8,15)x x=42,(16)0.6x+32.5=67.5,(17)1(x0.45)=5,(23)4x=3,(24)12x+70.3=20.1,(18)x2.25=8.25,(19):x=3:12,(20)x+0.8
2、=5.6,(21)1.4:x=1:0.75,(22)x(2)=24,25)x+x=,26)x:42=,27)0.5+x=,28)0.8:=0.48:x,29)=,(30)42:=:(31)5x0.4=75%,(39)37x=1.04,(40)x1 x=2,(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=,41)x x=14,42)3x x=,43)=,44)1.2:=,45)=:,46):=x:0.8,(47)x=+1,(55)x:0.3=:,(56)150%x+66=99
3、(48)125%X+25%x=+25%x,=,(49)X=,(50)(51)5:8=x:32,(52)2x+30.9=24.9,(53)5.3x2.9x=,(54)(72.8x)=1.5,57)x+60.8x=1658)59)60)3(X)=1.361)(X+0.5):2=(X4):,62)X0.05=3.528,(63)2X46=80,(64)44.53X=6.38,(65)4X7.2=10,(72)(73),(66)11.5X+X=20,(67)3.812+15X=87.6,(68)6X+5=17,(69)0.6(2.5+X)=4.2,(70):=X:,(71),74)4(+x)=,75)
4、0.25+x=,76)x,77)200:6=x:,78)4X=,79)8(x2)=2(x+7),(80):18%=,2x=,(81)(88)3(x+4.5)=60,(89)1.6x+2.4=7.52,x+x=46,(82)(83):x=:,(84)=,(85)5(3x4)2(x1)=5(2x1)(86)=,(87)8(2X7)=5(X+13),90)3(x0.8)=6.3,91)28.45x=5.8,92)x:=93)+2x=,94)x=15%,95)x x=,(96)x+50%x=6,(97):x=0.3:12,(98)4x+2(8x)=26,(104)x(105)x,(99)x=0,(10
5、0)+x=1,(101)x(+)=,(102),(103),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,(120)22.50.4x=12.5,(121)x:3.5=4:2,(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=240,122)x0.8x6=16,123):=x:8,124),125)x:15=:,126)x+x=,127)x
6、50%x=5,(128)1 x=,(129)2.5+1 x=3,(136)7x3=8.19,(137)32.89x=17.5,(130)3 x2=4,(131)8.53x=2,(132)3 x=4,(133)x5%=17.54,(134):=:(4x),(135)6x+31=49,0.36x=16,7+3x=69,56=0,0.454=2.7,4.6x=0.96,(9x)=3,(138)x(139)6(140)6x+2x(141)3x(142)5.8x(143)8.4(144)3x1.2=8,(145)5x+28=71,(146)8.71.2x=3.9,(153)7.83x=3.6,(154)
7、631.8x=7.2,(155)10:x=4.5:0.8,(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=26,156):=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,(164)x6.8=15.4,(171)5 x=,(172)x=,(165)1.9x=5.7,(166)4.3yy=4.6,(167)5x+2
8、.6=7.6,(168)x1.5=12.9,(169)9x+5x=8.4,(170)6.8+3.2x=14.8,173)4.5 3 x=1.5,174)(1+25%)x=0.5,175)x40%x=9,176)x20%=15.2,178)xx=,179)x75%=3,(180)4x,(188)=1,(181):x=:4.5,(189)4x56=12,(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(20 x)+4=0,190)8x3x=15.6,191)30(
9、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,解方程专项练习解方程专项练习 200200 题题答案: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
10、,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)2x x=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=
11、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%=820%,x=40;(15)x x=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
12、.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=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+7
13、0.3=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=,10 x=42,10 x10=3010,x=3(27)0.5+x=,0.75+x=3.75,0.75+x0.75=3.750.75,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
14、.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=6.41.6,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=
15、1.04,2.167x=1.04,2.167x1.04=1.041.04,1.127x=0,7x7=1.127,x=0.16;(40)x1 x=2,x1=2,x1+1=2+1,x=3,x=3,x=18;(41)x x=14,x=14,x=14,x=18;(42)3x x=,x=,x=,x=;(43)=,2.4x=720.26,2.4x=18.72,2.4x2.4=18.722.4,x=7.8;(44)1.2:=,x=1.25,x=6,x=6,x=9;(45)=:,x=18,x=,x=,x=12;(46):=x:0.8,x=0.8,x=0.04,x=0.2;(47)x=+1,x=,x=1(48)
16、125%X+25%x=+25%x,0.25x+0.250.25=10.25,0.25x=0.75,x=3;=,(49)0.25x=1.251.6,0.25x0.25=1.251.60.25,x=8;X=,(50)X=,x=;(51)5:8=x:32,8x=532,8x8=5328,x=20(52)2x+30.9=24.9,2x+2.7=24.9,2x+2.72.7=24.92.7,2x2=22.22,x=11.1;(53)5.3x2.9x=,2.4x=,2.4x2.4=2.4,x=;(54)(72.8x)=1.5,(72.8x)=1.5,72.8x=2.1,72.8x+2.8x=2.1+2.8
17、x,72.1=2.1+2.8x2.1,4.92.8=2.8x2.8,x=1.75;(55)x:0.3=:,x=0.3,x=,x=(56)150%x+66=99 1.5x+66=99 1.5x=33 x=22(57)x+60.8x=16 0.2x+6=16 0.2x=10 x=50(58)x=14.4(59)0.55x=5.5 x=10(60)3(X)=1.33(X)(x)=1.3(x),3=1.3x0.78,3+0.78=1.3x0.78+0.78,4.68=1.3x,4.681.3=1.3x1.3,x=3.6;(61)(X+0.5):2=(X4):,(x4)=(x+0.5),x4=x+0.5
18、,x10 x=x+x,2.25x10+10=0.125+10,2.25x2.25=10.1252.25,x=4.5(62)X0.05=3.528,X0.050.05=3.5280.05,X=0.1764;(63)2X46=80,2X24=80,2X24+24=80+24,2X=104,2X2=1042,X=52;(64)44.53X=6.38,183X=6.38,183X+3X=6.38+3X,6.38+3X=18,6.38+3X6.38=186.38,3X=11.62,3X3=11.623,X=;(65)4X7.2=10,4X7.2+7.2=10+7.2,4X=17.2,4X4=17.24,
19、X=4.3;(66)11.5X+X=20,12.5X=20,12.5X12.5=2012.5,X=1.6;(67)3.812+15X=87.6,45.6+15X=87.6,45.6+15X45.6=87.645.6,15X=42,15X15=4215,X=2.8(68)6X+5=17,6x+55=175,6x6=126,x=2;(69)0.6(2.5+X)=4.2,0.6(2.5+X)0.6=4.20.6,2.5+x=7,2.5+x2.5=72.5,x=4.5;(70):=X:,x=,x=,x=0.6(71),;(72)x=(77)200:6=x:6x=200,;,6x6=4806,;(73)
20、,(74)4(+x)=,+4x=,+4x=,4x=4,x=1;(75)0.25+x=,0.2+x=,0.2+x0.2=0.2,x=,x=(76)x,78)4X=,XX=X,X=4,X=4,;79)8(x2)=2(x+7),16=2X+14,16=14,;80):18%=,X=0.186.5,X=1.17,2x=,81)2x+2x=+2x,+2x=,+2x=,x=80(4 X=10(8X 6X 6X=30 X=5(X=7.8(2x=2x2=x=2,;x=x+x=46,(82)x(+)=46,x=46,x=46,(87)8(2X7)=5(X+13),16x56=5x+65,16x565x=5x+6
21、55x,11x56=65,11x56+56=65+56,11x=121,11x11=12111,x=11,(88)3(x+4.5)=60,x=40;(83):x=:,x=,x=,x=,x=;(84)=,1.6x=6.42,1.6x=12.8,1.6x1.6=12.81.6,x=8(85)5(3x4)2(x1)=5(2x1)15x202x+2=10 x5,13x18=10 x5,13x1810 x=10 x510 x,3x18=5,3x18+18=5+18,3x=13,3x3=133,x=;(86)=,3(6x1)=64,18x3=64,18x3+3=64+3,18x=67,18x18=6718
22、,(x+4.5)3=603,4.5=204.5,89)1.6x+2.4=7.52,2.4=7.522.4,1.6=5.121.6,;90)3(x0.8)=6.3,2.4=6.3,2.4+2.4=6.3+2.4,3=8.73,;91)28.45x=5.8,5x+5x=5.8+5x,5.8=28.45.8,5=22.65,92)x:=3,25=,;3 x+4.5=20 x+4.5 x=15.5(1.6x+2.4 1.6x=5.12 1.6x x=3.2(3x 3x 3x=8.7 3x x=2.9(28.4 5.8+5x=28.4 5.8+5x 5x=22.6 5x x=4.52(25x=25x=2
23、5x x=(93)+2x=,+2x=,2x=0,x=0;(94)x=15%,xx=15%x,0.15x=0.15,0.15x0.15=0.150.15,x=1;(95)x x=,x=,x=,x=(96)x+50%x=6,1.5x=6,1.5x1.5=61.5,x=4;(97):x=0.3:12,0.3x=,0.3x0.3=90.3,x=30;(98)4x+2(8x)=26,4x+162x=26,2x+16=26,2x+1616=2616,2x2=102,x=5(99)x=0,x+=0+,x=,x3=3,x=;(100)+x=1,+x=1,x=,x=,x=1;(101)x(+)=,x=,x=,x
24、=(102),3x3=,x=;(103),x=20;(104)x,x=;(105)x,x,x=(106)5x+35=650,5x+3535=65035,5x=615,5x5=6155,x=123;(107)7203x=80,7203x3x=803x,240 x=720,240 x240=720240,x=3;(108)3.6x0.9x=8.1,(3.60.9)x=8.1,2.7x=8.1,2.7x2.7=8.12.7,x=3;(109)44.53x=6,183x=6,183x+3x=6+3x,6+3x=18,6+3x6=186,3x=12,3x3=123,x=4(110)=,2.5x=100.
25、8,2.5x2.5=82.5,x=3.2;(111)631.8X=7.2,181.8X=7.2,181.8X+1.8X=7.2+1.8X,7.2+1.8X=18,7.2+1.8X7.2=187.2,1.8X=10.8,1.8X1.8=10.81.8,X=6(112)x=,x=,x=;(113)x=42,x=42,x=9;(114)x+=,x+=,x=,x=,x=(115)7x3=8.19,7x33=8.193,7x=24.57,7x7=24.577,x=3.51;(116)12:0.6=x:,0.6x=12,0.6x=6,0.6x0.6=60.6,x=10;(117)3(x+2)=4(x+1)
26、,3x+6=4x+4,3x+63x=4x+43x,x+4=6,x+44=64,x=2(118)3x70%x=9.2,3x0.7x=9.2,2.3x=9.2,2.3x2.3=9.22.3,x=4;(119)6+x=240,6+x6=2406,x=234,x=234,x=390(120)22.50.4x=12.5,22.50.4x+0.4x=12.5+0.4x,12.5+0.4x=22.5,12.5+0.4x12.5=22.512.5,0.4x0.4=100.4,x=25;(121)x:3.5=4:2,2 x=3.54,x=30;(128)1 x=,1 x+x=+x,+x=1,+x=1,x=,2
27、x2=142,x=6(122)x0.8x6=16,0.2x6=16,0.2x6+6=16+6,0.2x0.2=220.2,x=110;(123):=x:8,x=8,x=8 ,x=4;(124),0.06x=20.015,0.06x0.06=0.030.06,x=0.5;(125)x:15=:,x=15,x6=15 6,x=40;(126)x+x=,x=,x=,x=;(127)x50%x=5,x=5,x6=56,;129)2.5+1 x=3,x2.5=3 2.5,x=,x=,130)3 x2=4,x2+2=4+2,x=6,x3=6 3,;131)8.53x=2,3x+3x=2+3x,=8.5,2
28、=8.52,3=63,;132)3 x=4,xx=4x,x=(2.5+1 x=(3 3 3 x=(8.5 3x+2 3x+2 3x=6 3x x=2(3 4x=3,4x4=3 4,x=(133)x5%=17.54,解:x5%+5%=17.54+5%,x=17.59,x=23;(134):=:(4x),解:4x=,2 x+x=x,2+x,=x,x=3(135)6x+31=49,6x+3131=4931,6x=18,6x6=186,x=3;(136)7x3=8.19,7x33=8.193,7x=24.57,7x7=24.577,x=3.51;(137)32.89x=17.5,32.89x+9x=1
29、7.5+9x,17.5+9x=32.8,17.5+9x17.5=32.817.5,9x=15.3,9x9=15.39,x=1.7;(138)x0.36x=16,(10.36)x=16,0.64x=16,0.64x0.64=160.64,x=25;(139)67+3x=69,42+3x=69,42+3x42=6942,3x=27,3x3=273,x=9;(140)6x+2x56=0,(6+2)x56+56=0+56,8x=56,8x8=568,x=7(141)3x0.454=2.7,3x1.8=2.7,3x1.8+1.8=2.7+1.8,3x=4.5,3x3=4.53,x=1.5;(142)5.
30、8x4.6x=0.96,1.2x=0.96,1.2x1.2=0.961.2,x=0.8;(143)8.4(9x)=3,9x=8.43,9x=2.8,x=92.8,x=6.2;(144)3x1.2=8,3x1.21.2=81.2,3x=9.6,3x3=9.63,x=3.2(145)5x+28=71,5x+2828=7128,5x=43,5x5=435,x=8.6;(146)8.71.2x=3.9,8.71.2x+1.2x3.9=3.9+1.2x3.9,4.8=1.2x,1.2x=4.8,1.2x1.2=4.81.2,x=4;(147)8x2.6x=37.8,5.4x=37.8,5.4x5.4=3
31、7.85.4,x=7;(148)0.75x0.954=8.5,0.75x3.8=8.5,0.75x3.8+3.8=8.5+3.8,0.75x=12.3,0.75x0.75=12.30.75,x=16.4,;(149)542+3x=72,27+3x=72,27+3x27=7227,3x=45,3x3=453,x=15;(150)8x2.6=37.8,8x2.6+2.6=37.8+2.6,8x=40.4,8x8=40.48,x=5.05(151)x=,x =,x=,x4=4,x=;(152)x+30%x=26,(1+30%)x=26,1.3x=26,1.3x1.3=261.3,x=20;(153)
32、7.83x=3.6,7.83x+3x=3.6+3x,3.6+3x=7.8,3.6+3x3.6=7.83.6,3x=4.2,3x3=4.23,x=1.4(154)631.8x=7.2,181.8x=7.2,181.8x+1.8x=7.2+1.8x,18=7.2+1.8x,187.2=7.2+1.8x7.2,10.8=1.8x,10.81.8=1.8x1.8,x=6;(155)10:x=4.5:0.8,4.5x=100.8,4.5x=8,4.5x4.5=84.5,x=;(156):=x:,x=,x=,x=,x=(157)X7.65=4.64,X7.65+8.67=4.64+7.65,X=12.29
33、;(158)28.25X=8.25,28.25X+X=8.25+X,X+8.25=28.25,X+8.258.25=28.258.25,X=20;(159)X(3.6+2.97)=12.42,X6.57=12.42,X6.57+6.57=12.42+6.57,X=18.99(160)x=,xx=x,x=,x=,x=,x=;(161)14.5=5.5,14.5+14.5=5.5+14.5,=20,8=208,x=160(162)x80%x=48,(10.8)x=48,0.2x=48,0.2x0.2=480.2,x=240;(163)75%x5=6,0.75x3=6,0.75x3+3=6+3,0.
34、75x=9,0.75x0.75=90.75,x=12(164)x6.8=15.4,x6.8+6.8=15.4+6.8,x=22.2;(165)1.9x=5.7,1.9x1.9=5.71.9,x=3;(166)4.3yy=4.6,3.3y=4.6,3.3y3.3=4.63.3,y=;(167)5x+2.6=7.6,5x+2.62.6=7.62.6,5x=5,5x5=55,x=1(168)x1.5=12.9,x1.5+1.5=12.91.5,x=11.4;(169)9x+5x=8.4,14x=8.4,14x14=8.414,x=0.6;(170)6.8+3.2x=14.8,6.86.8+3.2x=
35、14.86.8,3.2x=8,3.2x3.2=83.2,x=2.5(171)5 x=,5 xx=x,5=x,5=x,x=;(172)x=,x+x=+x,=+x,=+x,=x,=x,x=1;(173)4.5 3 x=1.5,1.53.5x=1.5,1.53.5x+3.5x=1.5+3.5x,1.5=1.5+3.5x,1.51.5=1.5+3.5x1.5,0=3.5x,03.5=3.5x3.5,x=0(174)(1+25%)x=0.5,1.25x=0.5,1.25x1.25=0.51.25,x=0.4;(175)x40%x=9,0.6x=9,0.6x0.6=90.6,x=15;(176)x20%=
36、15.2,x20%20%=15.220%,x=76(177)30 x30=180,30 x30+30=180+30,30 x=210,30 x30=21030,x=7;(178)xx=,x=,x=x=,;(179)x75%=3,x75%75%=375%,x=,3x3=6.63,x=2.2(185)2x+5=5x7,2x+52x=5x72x,3x7=5,3x7+7=5+7,3x=12,3x3=123,x=4;(186)3(x2)=25(x2),3x6=125x,3x6+5x=125x+5x,x=,x=(180)4x,4x6=2.4,4x=2.4+6,x=8.44,x=2.1(181):x=:4.
37、5,x=4.5,x=2,x=2,x=5(182)(x4.5)6=12.5,6x4.56=12.5,6x27=12.5,6x27+27=12.5+27,6x=39.5,6x6=39.56,x=6;(183)2717x=13.4,2717x+17x=13.4+17x,13.4+17x=27,13.4+17x13.4=2713.4,17x=13.6,17x17=13.617,x=0.8;(184)9.6+3x=3.245,9.6+3x9.6=16.29.6,3x=6.6,6=12,6+6=12+6,8=188,;187)4x3(20 x)+4=0,56=0,56+56=0+56,7=567,;188
38、)=1,)24=124,(y+2)4(2y3)=24,2y=24,2y+2y=24+2y,24=3024,2=62,189)4x56=12,30=12,30+30=12+30,4=424,;190)8x3x=15.6,5=15.65,;8x 8x 8x=18 8x x=2.25(7x 7x 7x=56 7x x=8(6 30 30 2y+24=30 2y+24 2y=6 2y y=3(4x 4x 4x=42 4x x=10.5(5x=15.6 5x x=3.12(191)30(x4)=60,30(x4)30=6030,x4=2,x44=24,x=8;(192)7.20.53x=1.2,3.63
39、x=1.2,3.63x+3x=1.2+3x,3x+1.2=3.6,3x+1.21.2=3.61.2,3x=2.4,3x3=2.43,x=0.8(193)5x2.45=8,5x12+12=8+12,5x=20,5x5=205,x=4,(194)+x=2,x=,x=,x=(195)5x+2.415=66,5x+36=66,5x+36-36=66-36,5x=30,5x5=305,x=6;(196)3.2x+2.8x-x=1,5x=1,5x5=15,x=0.2;(197)2.516-8x=12,40-8x=12,40-8x+8x=12+8x,8x+12=40,8x+12-12=40-12,8x=28,8x8=288,x=3.5(198)9.6-3x=6.3,9.6-3x+3x=6.3+3x,6.3+3x=9.6,6.3+3x-6.3=9.6-6.3,3x=3.3,3x3=3.33,x=1.1;(199)5(x+6)=75,5x+30=75,5x+30-30=75-30,5x=45,5x5=455,x=9;(200)x0.7+0.93=4,x0.7+2.7=4,x0.7+2.7-2.7=4-2.7,x0.7=1.3,x0.70.7=1.30.7,x=0.91