小数方程计算专项练习题

小数方程专项练习（有答案）(8)6x-8.5X4=20

(1)(x+0.55)X4=3O6

(9)36-rx=0.4

(2)2x-r8=0o8

(10)9.6x-x二43

(3)105X2+2x=5

(11)3x-4X0.9=46.2

(4)4O7x=1o9x+7

(12)3O5x-4X7=42

(5)12o6(x+408)4-2=63

(13)x-d.9x=81o9

(6)12o5+4x=21o7

(14)3c8+5x=12o3

(7)13o5x-8.5x=20

(15)4(0o3+x)=6.8

(16)8x-1o6x=19o2

(25)x4-0.5=48.6X2

(17)x-Mo8=1.62

(26)5X-7.8=20o2,

(18)22.5X2+5x=135,

(27)205X-X二1.8,

(19)1.4x+9o8=22o4,

(28)(4.5+X)X2=13,

(20)2(x-3)=11o6,

(29)7x-2X9=80,

(21)68-4o4x=24,

(30)13x-7.5x=18.7,

(22)1.6X8-5x=2o3(31)(x+12)X6=108,

(23)2o5x4-20=16

(32)4x+3X0.7=6.5

(24)6.2x-x=41.6

(33)2X(x-0.5)=1.6

(42)2x-2+1o8=3.6

(34)3xX2.34=4.914

(43)7(x-1o2)=3.57

(35)1o44+x=0。4

(44)2+1.8-2x=3.6

(36)2x+6=12o5

(45)7x+0.3=4。2

(37)205x-x=1o2

(46)6x+4x-11=32.9

(38)(4.5+x)X2=63(47)7(x-1o2)=2。87

(39)2x-2.5X10=15

(48)2c4+3o4x=5.8

(40)3o85+1.5x=6.1

(49)5(x-1o2)=35

(41)13(x+2o5)=169

(50)2o5x+51=17X8

(59)2(x-3)=10o6

(51)2。4x+106x=202

(60)13x-x=14.4

(52)8(x-6.2)=41o6

(61)68-1.1x=24

(53)0.5(x-0.5)=7o5

(62)3(x+3o5)=21o6

(54)(9x+1.5+7x)4-5=5o1(63)3x-54=136.5

(55)3x+7=2905

(64)x-0.36x=3o2

(56)5x-2.8X102=1o04

(65)4x+2o8X4=19.32

(57)4x+6x=28.5

(66)4x-5o2=5o2

(58)2.38x+9.8=33o6

(67)4o8x+2.6x=3«7

(76)8x-4x=0o64

(68)3x+6.4X2=50o3

(77)2x-0o24=0.12

(69)2。7x-108=1o2x+2o7,

(78)(3.8-2)x=14o4

(70)8-5(6x+0.7)=10x+0.5,(79)64-16X=56.8

(71)7-rx-0o7=1.3,

(80)8.6X-2o6X=36o6

(72)(5.9+x)4-3+16=30,

(82)6X4-0.6X=6.36

(73)0.56X5-4x=0o4,

(83)0.03X150-5x=3.2

(74)4(x-0o5)二9。6,

(84)45.3-4X=35o7,

(75)2X(x+1.7)=9。2

(85)3(5o4+X)+6=7。2,(87)3+0o6x=4.32

(86)5.9X+7=8o7X,(88)0o6(y-0o4)=6,

(4)47x=1.9x+7

小数方程88题参考答案:0

4O7x-1o9x=1o9x-1.9x+7

(1)(x+0.55)X4二3.62o8x=7

(x+0o5)X44-4=3.64-42.8x4-2.8=74-2.8

x+0.5=0.9x=2.5

x+0o5-0o5=0o9-0o5

x=0o4(5)12。6(x+4o8)+2=63

(2)2x4-8=0.86.3X(x+4o8)=63

2x+8X4=0.8X46o3X(x+4o8)4-6o3=634-6O3

x=3.2x+4。8=10

(3)1.5X2+2x=5x+4o8-4.8=10-4o8

3+2x=5x二5。2；

3+2x-3=5-3(6)12o5+4x=21.7

2x4-2=24-212o5+4x-12o5=21.7-12.5

x=14x4-4=9o2+4

x=2.3

(16)8x-1.6x=19o2

(7)13.5x-8o5x=206.4x=19o2,

5x4-5=204-56a4x4-6o4=19.24-6o4,

x=4x=3;

(8)6x-8o5X4=20(17)x4-1.8=1.62

6x-34二20x4-1.8X1.8=1o62X108,

6x-34+34=20+34x=2o916;

6x4-6=544-6

x=9(18)22O5X2+5x=135,

(9)36-rx=0o445+5x-45=135-45,

364-xXx=0.4Xx5x4-5=904-5,

36=0.4Xxx=18.

364-0.4=0o4Xx4-0.4(19)104x+9.8=22。4,

x=90;1o4x+9.8-9o8=22o4-9.8,

1.4x=12o6,

(10)9o6x-x=431.4x-?1o4=12.64-1.4,

(906-1)x=43x=9;

8.6x-r8o6=434-8.5

x=5;(20)2(x-3)=1106,

2x-6=11o6,

(11)3x-4X0o9=46o22x-6+6-11o6+6,

3x-3.6=46。22x=17.6,

3x-3.6+3.6=46。2+3。62x4-2=17.64-2,

3x:3二49。84-3x=8o8；

x=16.6

(12)3O5x-4X7=42(21)68-4.4x=24,

3.5x-28=4268-4.4x+4o4x=24+404x,

3o5x-28+28=42+2824+4o4x=68,

3o5x—7024+4o4x-24=68-24,

3o5x4-3o5=704-3.54.4x=44f

x二20；4.4x4-4.4=44-T4O4,

(13)x-0o9x=81.9x=10

0.1x=8109(22)1.6X8-5x=203

0.1x-?0o1=81.94-0.112o8-5x+5x=2o3+5x

x=819;2.3+5x-2.3=1208-2o3

(14)3.8+5x=12.35x4-5=10o54-5

3.8+5x-3.8=12o3-3.8x=2.1;

5x=805

5x4-5=8o5+5(23)2o5x4-20=16

x=1o7;2o5x4-20X20=16X20

(15)4(0.3+x)=6.82.5x4-2.5=3204-2o5

4(0.3+x)-4-4=6.84-4x二128;

0o3+x=1o7(24)6.2x-x=41.6

0o3+x-0o3=1o7-0.35.2x=41o6

x=1.45.2x4-5o2=41o64-5.2

x=8;

(25)x-rOo5=48.6X2(34)3xX2o34=4.914

x-?0«5=97o27。02x=4914

x4-0.5X0o5二97。2X0。57O02x-r7o02=4.914+7。02

x=48o6x=0o7

(26)5X-7o8=20.2,

5x-7.8+7.8=20o2+7.8,(35)1.M^-x=0o4

5x4-5=284-5,1044-xXx=0。4Xx

x二5。6;0.4x=1.44

(27)2.5X-X=1.8,0o4x4-0.4=1.444-0.4

1o5x4-1o5=1.84-1.5,x=3.6

x=1.2；(36)2x+6=12o5

(28)(4O5+X)X2=13,2x+6-6=12o5-6

(4.5+x)X24-2=134-2,2x-r2-605~r2

4.5+x-4.5=6o5-4O5,x=3025：

x=2.

(29)7x-2X9=80,(37)2.5x-x=1.2

7x-18二80,1O5x=1.2

7x-18+18=80+18,1.5x-M05=1.2X5

7x=98,x=0.8；

7x+7=98+7,

x=14;(38)(4.5+x)X2=63

(4.5+x)X2^2=634-2

(30)13x-7.5x=18o7,4.5+x-4o5=31.5-4.5

(13-7O5)x=18.7,x=27；

5o5x=18<>7,

5o5x-r5o5-18o7-?5o5,(39)2x-2o5X10=15

x=3.4；2x-25+25=15+25

2x4-2=404-2

(31)(x+12)X6=108,x二20.

(x+12)X64-6=1084-6,(40)3.85+1.5x=6o1

x+12=18,3.85+1o5x=6o1

x+12-12=18-12,3085-3.85+1o5x=601-3。85

x=6.1.5x=2.25

(32)4x+3X0o7=6。5105x4-1.5=2.254-1.5

4x+2o1=6.5x=1o5

4x+2o1-2o1=6o5-2o1(41)13(x+2o5)=169

4x=4.413(x+2.5)4-13=1694-13

4x4-4=4.44-4x+2«5=13

x=1.1x+2.5-2.5=13-2.5

x=11.5

(33)2X(x-0o5)=1O6(42)2x-2+1.8=3.6

2x-1=1.62x-0o2=3.6

2x-1+1=1o6+12x+0.2-0o2-3o6+0o2

2x=2.62x=3o8

2x4-2=2o64-22x:2=3。8：2

x=1o3x=1.9

x=0.55；

(43)7(x-1o2)=3o57

7(x-1Q2):7=3.57+7(52)8(x-6o2)=41w6

x-1o2=0.518(x-6.2)+8=41.6:8

x+1.2-1o2=1.2+0o51x-6.2+6.2=5o2+6.2

x=1o71x=11.4.

(44)2+1。8-2x=3o6

3o8-2x+2x=3.6+2x(53)0o5(x-0.5)=7o5

3.8-3.6二3。6+2x-3.60.5(x-0.5)00。5=7.54-0.5

0.24-2=2x4-2x-0o5=15

x二0。1;x-0o5+0o5-15+0.5

x=15.5;

(45)7x4-0.3=4.2

7x4-0.3X0o3=4.2X0.3(54)(9x+105+7x)+5=5。1

7x4-7=1.264-7(16x+1o5)：5=5。1

x=0.18;(16x+1o5)95X5二5.1X5

16x+1o5=25.5

(46)6x+4x-11=32o916x+1.5-1.5=25o5-1o5

10x-11+11=32.9+1116x=24

10x4-10=43.94-1016x4-16=244-16

x=4.39;x=1o5;

(55)3x+7=29.5

(47)7(x-1.2)=2o873x+7-7=29.5-7

7(x-1.2)4-7=2.874-73x=22o5

x-1o2+1.2=0.41+1o23x4-3=22.54-3

x=1061x=705

(48)2.4+3o4x=5.8

2.4+3.4x-2.4=5.8-2O4(56)5x-2.8X1.2=1o04

3.4x=3o45x-3036-1o04

304x-r3o4=3.44-3.45x-3o36+3.36=1004+3.36

x=1;5x=4.4

5x-r5-4o4-r5

(49)5(x-1.2)二35x=0o88

5(x-1o2)4-5=354-5

x-1.2=7(57)4x+6x=28.5

x-1o2+1o2=7+1.21Ox二28。8

x=8.2；10x4-10=28o54-10

x=2.85

(50)2.5x+51=17X8(58)2o38x+9o8=33o6

205x+51=1362«38x+9o8-9.8=33.6-9.8

2o5x+51-51=136-512.38x4-2.38=23o8;2.38

2.5x=85x=10

2.5x4-2.5=854-2.5(59)2(x-3)=10.6

x二34.2(x-3):2=10。64-2

(51)2.4x+1.6x=2.2x-3+3=5.3+3

4x=2o2x=8o3;

4x4-4=2.24-4(60)13x-x=14.4

12x=14.42O7x-1.2x=1o2x+4o5-1o2x,

12x-r12=14.44-121o5x^-1o5=4。54-1.5,

x=1v2；x=3；

(61)68-1.1x=24

68-1o1x+1o1x=24+1o1x(70)8-5(6x+0.7)=10x+0o5,

68-24=24+1,1x-248-30x-3.5=IOx+O.5,

44^1.1=1.1x4-1.14.5-30x+30x=10x+0.5+30x,

x=40.405-0.5=40x-0.5,

44-40=40x4-40,

(62)3(x+3o5)=21.6x=0.1;

3(x+3.5)4-3=21.64-3

x+3.5-3©5=7.2-3.5(71)7^-x-0.7=1o3,

x=3o7;74-x-Oo7+0.7=1o3+0o7,

74-xXx=2Xx,

(63)3x-54=136.574-2=2x4-2,

3x-54+54=136.5+54x=3.5;

3x4-3=190.54-3

x=63.5;(72)(5.9+x)4-3+16=30,

(509+x)4-3+16-16=30-16,

(64)x-0.36x=3o2(5.9+x)4-3X3=14X3,

0o64x二3。25.9+x-5.9二42-5.9,

0.64x-?0o64=3o24-0.64x=36.1.

x=5;(73)0a56X5-4x=0.4,

2o8-4x=0.4,

(65)4x+2.8X4=19o322.8-4x+4x=0o4+4x,

4x+11o2-1102=19.32-11o20o4+4x=2.8,

4x4-4=8.124-40o4+4x-0.4=2.8-0.4,

x=2.03.4x=2o4,

(66)4x-5o2=5o24x4-4=2o44-4,

4x-5.2+5.2=5o2+5o2x=0.6;

4x=10o4

4x4-4=10o44-4(74)4(x-0.5)=9.6,

x=206：4x-2=9.6,

4x-2+2=9.6+2,

(67)4o8x+206x=3.74x=11.6,

7o4x=3o74x4-4=11.64-4,

7o4x4-7o4=3o74-7.4x=2.9.

x=0.5；(75)2X(x+1o7)=9.2

2X(x+1.7)4-2=9.24-2

(68)3x+6。4X2=50.3x+1o7=4o6

二。

3x+12o8=50o3x+1.7-1.746-1o7

3x+12.8-12.8=50o3-12。8x=2.9.

3x=37.5

3x+3=37。54-3(76)8x-4x=0o64

x=12o5.4x=0.64

(69)2.7x-1o8=1o2x+2o7,4x4-4=0.644-4

2.7x-1o8+1o8=1o2x+2.7+1.8,x=0o16.

35.7+4X=45。3,

(77)2x-0o24=0.1235o7+4X-35o7=45.3-35。7,

2x-0o24+0u24=0。12+0°246,

2x=0.364X4-4=9o64-4,

2x4-2=0o36+2X=2o4；

x=0o18.

(85)3(5.4+X)-r6=7o2,

(78)(3o8-2)x=14.4(3X5O4+3X)+6X6=7.2X6,

1.8x=14.4