2023年小学总复习解方程专项练习1.pdf
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1、 解方程专项练习-1 解方程专项练习 200 题(附答案)(1)x=,(2)x =,(3)4x=,(4)8 2.5 2x=13.6 (5)0.78:x=3:5,(6)120%x=0.4,(8)1(x)=6,(9)2x x=1.2,(10)931.7x=13.4,(11)x25%x=24,(12)x+0.2=,(13)0.6x+90%x=78,(14)20%x 2.4 3=0.8,(15)x x=42,(16)0.6x+3 2.5=67.5,(17)1(x0.45)=5,(18)x2.25=8.25,(19):x=3:12,(20)x+0.8=5.6,-2(21)1.4:x=1:0.75,(22
2、)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)x 1.1=3,(38)+2x=,(39)37x=1.04,(40)x1 x=2,(41)x x=14,(42)3x x=,-3(43)=,(44)1.2:=,(45)=:,(46):=x:0.8,(47)x=+1,(48)125%X+2
3、5%x=+25%x,(49)=,(50)X=,(51)5:8=x:32,(52)2x+30.9=24.9,(53)5.3x 2.9x=,(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)44.5 3X=6.38,-4(65)4X7.2=10,(66)11.5X+X=20,(67)3.8 12+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)-5(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)28.4 5x=5.8,(92)x:=(93)+2x=,(94)x=15%,(95)x x=,(96)x+50%x=6,(97):x=0.
5、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,-6(107)7203x=80,(108)3.6x 0.9x=8.1,(109)44.5 3x=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)3x 70%x=9.2,(119)6+x=240,(120)22.5 0.4x=12.5,(121)x:3.5=
6、4:2,(122)x0.8x 6=16,(123):=x:8,(124),(125)x:15=:,(126)x+x=,(127)x50%x=5,-7(128)1 x=,(129)2.5+1x=3,(130)3 x2=4,(131)8.5 3x=2,(132)3 x=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)3x0.45 4=2.7,(142)5.8x4.6x=0.96,(143)8.4(9x
7、)=3,(144)3x1.2=8,(145)5x+28=71,(146)8.7 1.2x=3.9,(147)8x2.6x=37.8,(148)0.75x 0.95 4=8.5,(149)542+3x=72,-8(150)8x2.6=37.8,(151)x=,(152)x+30%x=26,(153)7.8 3x=3.6,(154)6 31.8x=7.2,(155)10:x=4.5:0.8,(156):=x:,(157)X7.65=4.64,(158)28.25 X=8.25,(159)X(3.6+2.97)=12.42,(160)x=,(161)14.5=5.5,(162)x80%x=48,(1
8、63)75%x 5=6,(164)x6.8=15.4,(165)1.9x=5.7,(166)4.3y y=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)5 x=,(172)x=,(173)4.5 3 x=1.5,-9(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=3.24 5,
9、(185)2x+5=5x7,(186)3(x2)=25(x2),(187)4x3(20 x)+4=0,(188)=1,(189)4x56=12,(190)8x3x=15.6,(191)30(x4)=60,(192)7.2 0.5 3x=1.2,(193)5x2.4 5=8,(194)+x=2,(195)5x+2.4 15=66,(196)3.2x+2.8x-x=1,-10(197)2.5 16-8x=12,(198)9.6-3x=6.3,(199)5(x+6)=75,(200)x0.7+0.9 3=4,-11 答案:(1)x=,=,x=;(2)x =,x=,x21=21,x=12;(3)4x=
10、,4x+4x=+4x,=+4x,4=4x4,x=(4)8 2.5 2x=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=0.4,1 20%x+20%x=0.4+20%x,0.4+20%x=1,0.4+20%x0.4=1 0.4,20%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
11、=13.4,271.7x=13.4,27 1.7x+1.7x=13.4+1.7x,13.4+1.7x=27,13.4+1.7x 13.4=27 13.4,1.7x=13.6,1.7x1.7=13.6 1.7,x=8(11)x25%x=24,75%x=24,75%x75%=24 75%,x=32;(12)x+0.2=,x0.6=,x0.6+0.6=+0.6,x=,x=,x=1 (13)0.6x+90%x=78,-12 1.5x=78,1.5x1.5=78 1.5,x=52;(14)20%x 2.4 3=0.8,20%x7.2=0.8,20%x 7.2+7.2=0.8+7.2,20%x20%=8
12、20%,x=40;(15)x x=42,x=42,x=42,x=252(16)0.6x+3 2.5=67.5,0.6x+7.5=67.5,0.6x+7.57.5=67.5 7.5,0.6x=60,0.6x0.6=60 0.6,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+0.8 0.8=5.6 0.8,x=4.
13、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=20.1 2.1,12x12=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=,-13 0.75+x=3.75,0.75+x0.75=3.75 0.75,x=3,x=3,x=6;(28)0.8:=0.48:x,
14、0.8x=0.48,0.8x=0.2,0.8x0.8=0.2 0.8,x=(29)=,x=,x=,x=3;(30)42:=:x=42,x=30,x=50;(31)5x0.4=75%,5x 0.4+0.4=75%+0.4,5x5=1.15 5,x=0.23 (32)6x0.9=4.5,6x 0.9+0.9=4.5+0.9,6x=5.4,6x6=5.4 6,x=0.9;(33)2(x3)=5.8,2(x3)2=5.8 2 x3=2.9,x3+3=2.9+3,x=5.9;(34)1.6x=6.4,1.6x 1.6=6.4 1.6,x=4;(35)4x39=29,4x27=29,4x 27+27=29
15、+27,4x=56,4x4=564,x=14;(36)16+8x=40,16+8x16=4016,8x=24,8x8=248,x=3;(37)x 1.1=3,x1.1 1.1=3 1.1,x=3.3(38)+2x=,+2x=,2x=,2x2=2,x=;(39)37x=1.04,2.167x=1.04,2.167x1.04=1.04 1.04,1.127x=0,7x7=1.12 7,x=0.16;(40)x1 x=2,x1=2,x1+1=2+1,x=3,x=3,x=18;(41)x x=14,-14 x=14,x=14,x=18;(42)3x x=,x=,x=,x=;(43)=,2.4x=720
16、.26,2.4x=18.72,2.4x 2.4=18.72 2.4,x=7.8;(44)1.2:=,x=1.2 5,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)1 25%X+25%x=+25%x,0.25x+0.25 0.25=1 0.25,0.25x=0.75,x=3;(49)=,0.25x=1.251.6,0.25x 0.25=1.25 1.6 0.25,x=8;(50)X=,X=,x=;(51)5:8=x:32,8x=5 32,8x8=5328,x=20(52)
17、2x+30.9=24.9,2x+2.7=24.9,2x+2.72.7=24.9 2.7,2x2=22.2 2,x=11.1;(53)5.3x 2.9x=,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+2.8x,72.1=2.1+2.8x 2.1,4.92.8=2.8x 2.8,x=1.75;(55)x:0.3=:,x=0.3 ,-15 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=5
18、0(58)x=14.4(59)0.55x=5.5 x=10(60)3(X)=1.3 3(X)(x)=1.3(x),3=1.3x 0.78,3+0.78=1.3x 0.78+0.78,4.68=1.3x,4.681.3=1.3x 1.3,x=3.6;(61)(X+0.5):2=(X4):,(x4)=(x+0.5),x4=x+0.5,x10 x=x+x,2.25x10+10=0.125+10,2.25x2.25=10.125 2.25,x=4.5(62)X0.05=3.528,X0.05 0.05=3.528 0.05,X=0.1764;(63)2X46=80,2X24=80,2X24+24=80
19、+24,2X=104,2X2=1042,X=52;(64)44.5 3X=6.38,183X=6.38,183X+3X=6.38+3X,6.38+3X=18,6.38+3X6.38=18 6.38,3X=11.62,3X3=11.62 3,X=;(65)4X7.2=10,4X7.2+7.2=10+7.2,4X=17.2,4X4=17.2 4,X=4.3;(66)11.5X+X=20,12.5X=20,12.5X12.5=20 12.5,X=1.6;(67)3.8 12+15X=87.6,45.6+15X=87.6,45.6+15X45.6=87.6 45.6,15X=42,15X15=4215
20、,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=4.2 0.6,2.5+x=7,2.5+x2.5=7 2.5,x=4.5;(70):=X:,x=,x=,x=0.6 -16(71),;(72),;(73),(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,x=;(77)200:6=x:,6x=200,6x6=4806,x=80 (78)4X=,4XX=X,X=4,X=4,X=10;(79)8(x2)=2(
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