解比例(方程)专项练习180题_解比例方程练习题
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解比例专项练习183题(有答案)
(1)x:8=:,(2):=:X,(3)16:x=0.75:,(4)(x﹣0.4):8=,(5)1.6:x=0.125:0.5
(6):=:x,(7)x:1.2=3:4,(8)12:3=:x,(9)=5:3,(10)0.8:4=x:8,(11)16:x=2.4:3,(12):x=:,(13)
=,(14)x:7.5=0.16:1,解比例----1
(15)(4.5﹣x):0.6=(10+x):2,(16),(17),(18)=,(19)X:18.5=5:4,(20)8:X=:,(21)0.5:0.25=0.2:X,(22)x:12=:2.8,(23):=x:,(24)=,(25)9:5﹦4.5:x,(26):x﹦:,(27)﹦,(28):﹦x:8,(29)x:﹦51:17,(30)﹦:,(31)6:x=4:7,(32)30:x=54:36,(33)2.5:15=:x,(34)=,(35):=:x,(36)x:17=,(37)=,解比例---2
(38)1.3:x=5.2:20,(39)x:36=6:18,(40),(41):=x:9
(42):x=:
(43)x:42=:10,(44)=,(45):x=:6,(46)=,(47):x=:,(48)20:x=:
(49)x:0.4=0.6:0.3,(50)=,(51)8:9=4:x,(52)3:4=x:1.2,(53)=,(54)
=,(55)x:=:,(56),(57)
=x:.
(58)
6:x=4.5:1,(59)
3:x=:1,(60)0.72:x=9.6:4.8,(61)12:=x:0.5,解比例---3
(62):=,(63)x:=28:,(64)x:6.4=12:8,(65):x=:3,(66)=,(67),(68),(69)=8:x,(70),(71)4:1=x:,(72):3=x:0.7,(73)x:1.8=5:14,(74)=,(74)75:x=2.5:12,(75)0.75:=x:,(76)25:7=x:35
(77)514:35=57:x
(78)23:x=12:14
(79)x:15=13:56
(80)34:x=54:2
(81)x:0.75=81.25
(82)x:=:4,(83)=,(84):=X:9,解比例---4
(85)0.75:
=X:,(86)=,(87)3.6:x=1.8:3,(88),(89),(90)8:13=20:x,(91)x:2.5=4:0.5,(92),(93),(94)x:36=3:54,(95)0.6:0.8=x:20,(96):x=:12,(97)=,(98)0.7:18=21:x(98)=
(99)1.5:2.5=12:x
(100)
:=:x
(101)
=
(102)
=
(103):=:x,(104)(6+x):4=9:5
(105)=,(106)=,(107)4:16=9:x,解比例---5
(108)
:=x:,(109)
=,(110)0.5:x=:
(111)=
(112)=:
(113):=:x
(115)X:=1.25:3,(116),(117)8:x=1.8:3.6,(118):=6:x,(119)6:=x:,(120),(121)2:5=X:6
(122):=X:
(123)=
(124):=:X
(125):X=3:12
(126)0.4:0.8=
(127):=x:,(128):x=3:12,(129)=,(130)2.7:x=54:18,(131):=x:,(132)=,解比例---6
(133)3:x=9:15,(134)=,(135):=:x,(136)=x:,(137)0.1:0.5=,(138)1.25:0.25=x:1.6,(139)=0.8:,(140)0.75:X=0.51:3.4,(141)12:20=:X,(142)=,(143):=x:9,(144)4:x=×5,(145):=:x,(146)0.5:x=:0.25,(147)=,(148):=:x,(149)15:x=0.2:44,(150):=20:x,(151)=,(152)40:x=2.5:15,(153)3:8=x:2.4,(154):=x:15,(155):x=6:,(156)8.5:x=4:12
解比例---7
(157)0.1:0.5=
(158):x=:
(159)1.2:3=:x.
(160)=,(161)8:30=24:x,(162):=x:,(163)x:=16:.
(164)15:6=10:x,(165):X=:2,(166)=0.8:1.2,(167)=,(168)x:3.25=:,(169):=x:,(170)45:54=60:x,(171)3:2.5=x:40,(172):=x:,(173)=,(174)6.5:x=3.25:4,(175):=x:9,(176)8:30=24:X,(177):=X:,(178)=,解比例---
(179)6.5:x=3.25:4,(180)75:x=25:15,(181)24%x+8%x=16,(182)1.8:x=:,(183)
=,参考答案:
(1)x:8=:,x=8×,x×5=6×5,x=30
(2):=:X,x=×,x=,x=.
x=
(3)16:x=0.75:,0.75x=16×,x=30,x=30×,x=40
(4)(x﹣0.4):8=,(x﹣0.4):8=3:2,2×(x﹣0.4)=8×3,2x﹣0.8=24,2X﹣0.8+0.8=24+0.8,2x=24.8,2x÷2=24.8÷2,x=12.4
(5)1.6:x=0.125:0.5
0.125x=0.5×1.6
0.125x×8=0.8×8,x=6.4.
(6):=:x,x=×,x=,x=.(7)x:1.2=3:4,4x=1.2×3,4x÷4=3.6÷4,x=0.9.(8)12:3=:x,12x=,12x÷12=3÷12,x=0.25.(9)
=5:3,3x=5×2.4,3x=12,3x÷3=12÷3,x=4
(10)0.8:4=x:8,4x=0.8×8,4x÷4=6.4÷4,x=1.6;(11)16:x=2.4:3,2.4x=16×3,2.4x÷2.4=48÷2.4,x=20;(12):x=:,x=,x×=,x=;(13)
=,4x=3×(840﹣x),4x=2520﹣3x,4x+3x=2520﹣3x+3x,7x÷7=2520÷7,x=360.
(14)x:7.5=0.16:1,1x=7.5×0.16,解比例---9
1x÷1=1.2÷1,x=0.64.
(15)(4.5﹣x):0.6=(10+x):2,0.6×(10+x)=(4.5﹣x)×2,6+0.6x=9﹣2x,6+0.6x+2x=9﹣2x+2x,6+2.6x=9,6+2.6x﹣6=9﹣6,2.6x÷2.6=3÷2.6,x=
.
(16),0.7x=7%,0.7x÷0.7=0.7,x=;
(17),5x=8×1,5x÷5=10÷5,x=2.(18)
=,3x=8×2,3x÷3=16÷3,x=5;(19)X:18.5=5:4,4x=18.5×5,4x÷4=92.5÷4,x=23.125;(20)8:X=:,x=8×,x
=2,x=6;
(21)0.5:0.25=0.2:X,0.5x=0.25×0.2,0.5x÷0.5=0.05÷0.5,17x=,x=0.1(22)x:12=:2.8,2.8x=12×,2.8x÷2.8=21÷2.8,x=7.5;(23):=x:,x=×,x=,x=;(24)=,2x=3.2×5,2x÷2=16÷2,x=8(25)9:5﹦4.5:x,9x=5×4.5,9x÷9=22.5÷9,x=2.5;
(26):x﹦:,,x=;(27)﹦,0.4x=28×0.1,0.4x÷0.4=2.8÷0.4,x=7;(28):﹦x:8,,x=6.(29)x:﹦51:17,17x÷17=,x=;
(30)﹦:,,x=2.4
(31)6:x=4:7,4x=6×7,4x=42,4x÷4=42÷4,x=10.5;(32)30:x=54:36,54x=30×36,54x=1080,54x÷54=1080÷54,x=20;(33)2.5:15=:x,2.5x=15×,2.5x=5,2.5x÷2.5=5÷2.5,x=2;(34)=,0.6x=2×0.15,0.6x=0.3,0.6x÷0.6=0.3÷0.6,x=0.5(35):=:x,x=×,x
=,x=;
(36)x:17=,3.4x=17×4,3.4x÷3.4=68÷3.4,x=20;
解比例---10
(37)=,1.5x=9×3.5,1.5x÷1.5=31.5÷1.5,x=21
(38)1.3:x=5.2:20,5.2x=1.3×20,5.2x÷5.2=26÷5.2,x=5;
(39)x:36=6:18,18x=36×6,18x÷18=216÷18,x=12;
(40),x=,x
=,x=
(41):
=x:9
x=9
x
=
x=54;
(42):x=:
x=
x
=
x=
.
(43)x:42=:10,10x=42×,10x=30,10x÷10=30÷10,x=3;
8x=9×4,(44)=,0.8x=2.4×15,0.8x=36,0.8x÷0.8=36÷0.8,x=45;(45):x=:6,x=×6,x=3,x÷=3÷,x=4(46)=,1.5x=5,1.5x÷1.5=5÷1.5,x=,(47):x=:,x=×,x×4=×4,x=
(48)20:x=:
x=20×,x=16,x=56;
(49)x:0.4=0.6:0.3,0.3x=0.4×0.6,0.3x÷0.3=0.24÷0.3,x=0.8;(50)=,18x=25×3.6,18x÷18=90÷18,x=5(51)8:9=4:x,8x÷8=36÷8,x=4.5;
(52)3:4=x:1.2,4x=3×1.2,4x÷4=3.6÷4,x=0.9;(53)
=,1.2x=1.5×6,1.2x÷1.2=9÷1.2,x=7.5;
(54)
=,15x=4×4,15x÷15=16÷15,x=1;
(55)x:=:,x=,x
=,x=
(56),X=
×,X=,X=.
(57)
=x:.
x=,x=,x=×,x=2
.
(58)
6:x=4.5:1,解比例---11
4.5x=6×1,4.5x÷4.5=8.1÷4.5,x=1.8
(59)
3:x=:1,x=3×1,x=
×,x÷=
×÷,x=
×÷,x=10
(60)0.72:x=9.6:4.8,9.6x=0.72×4.8,9.6x÷9.6=3.456÷9.6,x=0.36;(61)12:=x:0.5,x=12×0.5,x
=6,x=10;(62):=,x=15,x
=,x=8;
(63)x:=28:,x=
28,x
=7,x=42
(64)x:6.4=12:8,8x=6.4×12,8x=76.8,8x÷8=76.8÷8,x=9.6;(65)
:x=:3,x=,x÷=÷,x=;
(66)=,0.3x=8.1,0.3x÷0.3=8.1÷0.8,x=27(67),6x=0.4×0.9,6x=0.36,6x÷6=0.36÷6,x=0.06;(68),x=×,x=,x÷=÷,x=;
(69)=8:x,x=×8,x=,x÷=÷,x=48;
(70),0.25x=×,0.25x=3.75,0.25x÷0.25=3.75÷0.25,x=15;(71)4:1=x:,x=4×,x=2;(72):3=x:0.7,3x=×0.7,3x=0.6,3x÷3=0.6÷3,x=0.2.(73)x:1.8=5:14,14x=1.8×5,14x=9,x=;
(74)
=,x=×,x=1,x=;
(74)75:x=2.5:12,2.5x=75×12,2.5x=900,x=360;
(75)0.75:=x:,x=×,x=,x=
.
(76)25:7=x:35
7x=25×35
7x=875
x=125;
(77)514:35=57:x
514x=35×57
514x=1995
x=3;
(78)23:x=12:14
解比例---12
12x=23×14
12x=322
x=26;
(79)x:15=13:56
56x=15×13
56x=195
x=3;
(80)34:x=54:2
54x=34×2
54x=68
x=1;
(81)x:0.75=81.25
x=0.75×81.25
x=60.9375(82)x:=:4,4x=,4x÷4=4,x=;(83)=,4.5x=9×0.8,4.5x÷4.5=7.2÷4.5,x=1.6;(84):=X:9,x=9,x
=6,x=7.2(85)0.75:=X:,X=0.75×,9X=1.5×2,X=1.5×2÷9,X=;
(86)=,4x=2.5×5,x=2.5×5÷4,x=3;
(87)3.6:x=1.8:3,1.8x=3.6×3,x=3.6×3÷1.8,x=6
(88),,x=;(89),0.2x=0.05×4,0.2x÷0.2=0.2÷0.2,x=1;(90)8:13=20:x,8x=13×20,8x÷8=260÷8,x=32.5;(91)x:2.5=4:0.5,0.5x=2.5×4,0.5x÷0.5=10÷0.5,x=20;(92),4x=2.6×4.8,4x÷4=12.48÷4,x=3.12;(93),0.1x=0.5×0.4,0.1x÷0.1=0.2÷0.1,x=2(94)x:36=3:54,54x=36×3,54x÷54=108÷54,x=2;(95)0.6:0.8=x:20,0.8x=0.6×20,0.8x÷0.8=12÷0.8,x=15;
(96):x=:12,x=×12,x×
=6×,x=9;(97)=,2x=7×8,2x÷2=56÷2,x=28
(98)0.7:18=21:x
0.7x=21×18
x=540;(98)
=
48x=36×4
x=3;
(99)1.5:2.5=12:x
1.5x=2.5×12
x=20;(100)
:=:x
x=×
x=;(101)
=
2x=22.4×3
x=33.6;(102)
=
2.5x=1.25×1.6 x=8.
(103):=:x,x=×,x=,x=;
(104)(6+x):4=9:5(6+x)×5=36,5x=6,x=;
解比例---13
(105)=,3x=0.75×2,3x=1.5,x=0.5;(106)=,1.2x=0.8,x=.
(107)4:16=9:x,4x=9×16,4x÷4=9×16÷4,x=36;
(108):=x:,x=×,x×2=
×2,x=;
(109)
=,0.5x=0.05,0.5x÷0.5=0.05÷0.5,x=0.1.
(110)0.5:x=:
解:x=0.5×
x=1.2;
(111)
=
解:0.25x=1.25×1.6
0.25x=2
x=8;
(112)=:
x=75× x=
x=45;
3.2x=0.6×8,(113):=:x
解:x=× x=
x=.
(115)X:=1.25:3,3x=×1.25,3x=,3x÷3=÷3,x=;
(116),14x=0.7×5,14x=3.5,14x÷14=3.5÷14,x=0.25(117)8:x=1.8:3.6,1.8x=8×3.6,1.8x÷=28.8÷1.8,x=16;(118):=6:x,x=×6,x=4,x=8;(119)6:=x:,x=×6,x=,x=,x=;(120),3.2x=4.8,3.2x÷3.2=4.8÷3.2,x=1.5
(121)2:5=X:6
5X=2×6
5X=12
5X÷5=12÷5
X=2.4;
(122):=X:
X=×
X=
X÷=
÷
X=;
(123)=
4.5X=9×0.8
4.5X=7.2 4.5X÷4.5=7.2÷4.5
X=1.6;
(124):=:X X=× X= X÷=
÷
X=;
(125):X=3:12
3X=×12
3X=9
3X÷3=9÷3
X=3;
解比例---14
(126)0.4:0.8=
0.8X=0.4×4
0.8X=1.6
0.8X÷0.8=1.6÷0.8
X=2.
(127):=x:,x=,x×
=×,x=,(128):x=3:12,3x=12×,3x÷3=9÷3,x=3.(129)=,0.9x=4.5×0.8,x=,x=4;
(130)2.7:x=54:18,54x=2.7×18,x=,x=0.9;(131):=x:,x=×,x=,x=,x=;
(132)
=,2.25x=1.25×1.6,x=,x=.
(133)3:x=9:15,9x=3×15,9x÷9=45÷9,x=5;
(134)=,75x=25×1.2,75x÷75=30÷75,x=0.4;(135):=:x,3,x=.(136)=x:,=,x=,x=,x=;
(137)0.1:0.5=,0.1x=0.5×0.4,x=,x=2;
(138)1.25:0.25=x:1.6,0.25x=1.25×1.6,x=,x=8;
(139)=0.8:,0.8x=,x=,x=,x=
.
(140)0.75:X=0.51:3.4,0.51X=0.75×3.4,0.51X=2.55,0.51X÷0.51=2.55÷0.51,X=5;
(141)12:20=:X,12X=20×,12X=16,12X÷12=16÷12,X=.
(142)
=,8x=21×0.4,x=,x=1.05,(143):=x:9,x=×9,x=6,x=6,x=,(144)4:x=×5,x=4,x=4,x=;
(145):=:x,解比例---15
x=×,x=,x=,x=
(146)0.5:x=:0.25,x=0.25×0.5,x=1.25,x=1.25,x=1.875,(147)
=,75x=25×1.2,x=,x=0.4,(148):=
:x,x=
×,x=,x=,x=,(149)15:x=0.2:44,0.2x=15×44,x=,x=3300
(150):=20:x,,x=;
(151)=,3x=9×8,3x÷3=72÷3,x=24;
(152)40:x=2.5:15,2.5x=40×15,2.5x÷2.5=600÷2.5,x=240.
(153)3:8=x:2.4,8x=3×2.4,8x÷8=7.2÷8,x=0.9;
(154):=x:15,x=×15,x÷=÷,x=40;
(155):x=6:,6x=×,6x÷6=÷6,x=.
(156)8.5:x=4:12 4x=8.5×12,4x=102,x=25.5;(157)0.1:0.5=
0.1x=0.5×0.4,0.1x=0.2,解得x=2;
(158):x=: x=×,x=,解得x=;
(159)1.2:3=:x. 1.2x=3×,1.2x=1.2,解得x=1
(160)
=,14x=3.5,14x÷14=3.5÷14,x=0.25,(161)8:30=24:x,8x=30×24,8x÷8=30×24÷8,x=90,(162):=x:,x=×,x×=×,x=,(163)x:=16:.x=
×16,x×4=×4,x=
.
(164)15:6=10:x,15x=6×10,15x÷15=60÷15,x=4;
(165):X=:2,x=×2,解比例---16
x÷=÷,x=3;
(166)=0.8:1.2,0.8x=6×1.2,0.8x÷0.8=7.2÷0.8,x=9(167)
=,3x=0.5×0.8,3x÷3=0.4÷3,x=;
(168)x:3.25=:,,x=;
(169):=x:,,x=
(170)45:54=60:x,45x=54×60,45x÷45=3240÷45,x=72;
(171)3:2.5=x:40,2.5x=3×40,2.5x÷2.5=120÷2.5,x=48;
(172):=x:,x=,x
=,x=;
(181)24%x+8%x=16,32%x=16,32%x÷32%=16÷32%,(173)=,40x=24×5,40x÷40=120÷40,x=3;
(174)6.5:x=3.25:4,3.25x=6.5×4,3.25x÷3.25=26÷3.25,x=8;
(175):=x:9,x=9,x=6,x=7.2
(176)8:30=24:X,8x=30×24,8x÷8=720÷8,x=90;
(177):=X:,x=,x=,x=;
(178)=,40x=×5,40x÷40=120÷40,x=3;
(179)6.5:x=3.25:4,25x=6.5×4,3.25x÷3.25=26÷3.25,x=8.
(180)75:x=25:15,25x=75×15,25x÷25=1125÷25,x=45;
x=50;
(182)1.8:x=:,x=1.8×,x
=,x=;
(183)
=,0.5x=0.25×2,0.5x÷0.5=0.5÷0.5,x=1
解比例---