整数小数简易方程计算专项练习120题有答案.docx
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整数小数简易方程计算专项练习120题有答案
整数小数简易方程专项练习120题(有答案)
(1)ⅹ+3.4=11.2
(2)2(ⅹ﹣1.5)=9
(3)11ⅹ+21=28.7
(4)1.4x+9.8=22.4
(5)2(x﹣3)=11.6
(6)13x﹣x=144
(7)1.2÷x=0.5
(8)x﹣3.5+4.5=12
(9)1.3x﹣0.4=0.9
(10)x﹣0.1x=1.08
(11)5x+7=42
(12)4.36x﹣0.36x=16
(13)x÷0.3=9
(14)x﹣6=33
(15)12x﹣9x=8.7
(16)6x+18=483
(17)x+2.1=1
(18)0.5x+4.8=7.2
(19)42+4x=54
(20)6x﹣28.5=7.5
(21)6y+3y=13.5
(22)8.5x﹣2.8x=18.24
(23)x÷1.2=0.4
(24)9x+8=71
(25)x÷3=4
(26)740﹣x=410
(27)0.8X=0.56
(28)8÷x=9
(29)x﹣7.25=0.54
(30)3.7+x=10.5
(31)x+8.9=37.5
(32)x÷6=7.05
(33)12x=14.4
(34)4x+6.7=8.7
(35)5.5x﹣1.3x=12.6
(36)x÷10=25
(37)4x﹣1.2=74
(38)x+3.2=7.4
(39)x÷3=1.4
(40)0.15x﹣3.8=8.5
(41)2(x﹣0.5)=1.6
(42)7x﹣2x=14.6
(43)10n+5n=0.6
(44)7y+6=41
(45)x﹣7.8=10.2
(46)1.8x=2.16
(47)2(x+1.7)=9.2
(48)8x﹣4x=0.64
(49)2x﹣0.24=0.12
(50)7x+2.5x=3.8
(51)20x=70
(52)0.55x﹣0.3x=15
(53)135﹣x+20=120
(54)x﹣0.036=1.28
(55)10x+25=100
(56)32x+18x=120
(57)x﹣0.6x=18
(58)0.4x+30=80
(59)6x+18=48
(60)x+2.6x=7.2
(61)12x﹣9x=8.7
(62)3(x+2.1)=10.5
(63)x+523=523
(64)x×201=201
(65)x÷22=484
(66)x﹣125=315
(67)8x﹣2x=42
(68)5x﹣7×12=41
(69)x÷6=1.5
(70)2x+5=40
(71)2.2x+7.8x=15.36
(72)9x﹣5x=36
(73)75x+25x=315
(74)x+2.1x=930
(75)0.6x+x=240
(76)x﹣0.65x=14
(77)x﹣0.4x=240
(78)9x+0.3x=18.6
(79)16x﹣40=440
(80)5x+45=300
(81)8x﹣13.6=0
(82)0.9x+4=22
(83)6ⅹ+4ⅹ﹣11=2.9
(84)5x﹣4.2=6.3
(85)x÷1.2=4.8
(86)x﹣0.6x=0.24
(88)6x﹣35=13
(89)12x﹣9x=8.7
(90)9×(x﹣2)=36
(91)5.6x﹣8.6=19.4
(92)3.2x﹣1.5x=0.51
(93)2x+1.2×5=7
(94)5.6x=11.2
(95)2x+1.6=3.4
(96)12.5x+x=108
(97)3x﹣4×6.5=7.6
(98)x÷1.44=2
(99)5x+1.5=4.5
(100)5x﹣3.5x=6
(101)6.8+2x=24.3
(102)7x÷0.7=8.8
(103)3x﹣213=45
(104)2.8x+3.4x=9.92
(105)23x﹣3×23=138
(106)4.2x﹣2.4x=12.6
(107)7x﹣3.8×2=8.5
(108)9x﹣1.8×0.4=9
(109)3x﹣2.4=3.6
(110)2x+9=33
(111)x﹣0.85x=3
(112)40+2x=220
(113)4x﹣6=28
(114)4x﹣2x=48
(115)2x÷9=25
(116)2y+3y+6=14.2
(117)5.34+X=26.7
(118)X﹣24.5=6.48
(119)X+2X=45
(120)X÷0.6=4.5
整数小数简易方程120题参考答案:
(1)ⅹ+3.4=11.2
x+3.4﹣3.4=11.2﹣3.4
x=7.8
(2)2(ⅹ﹣1.5)=9
2(ⅹ﹣1.5)÷2=9÷2
x﹣1.5+1.5=4.5+1.5
x=6
(3)11ⅹ+21=28.7
11x+21﹣21=28.7﹣21
11x=7.7
11x+11=7.7÷11
x=0.7
(4)1.4x+9.8=22.4
1.4x+9.8﹣9.8=22.4﹣9.8
1.4x÷1.4=12.6÷1.4
x=9
(5)2(x﹣3)=11.6
2(x﹣3)÷2=11.6÷2
x﹣3+3=5.8+3
x=8.8
(6)13x﹣x=144
12x÷12=144÷12
x=12
(7)1.2÷x=0.5
1.2÷x×x=0.5x
1.2=0.5x
1.2÷0.5=0.5x÷0.5
x=2.4;
(8)x﹣3.5+4.5=12
x+1=12
x+1﹣1=12﹣1
x=11;
(9)1.3x﹣0.4=0.9
1.3x﹣0.4+0.4=0.9+0.4
1.3x=1.3
1.3x÷1.3=1.3÷1.3
x=1;
(10)x﹣0.1x=1.08
0.9x=1.08
0.9x÷0.9=1.08÷0.9
x=1.2.
(11)5x+7=42
5x+7﹣7=42﹣7
5x=35
5x÷5=35÷5
x=7
(12)4.36x﹣0.36x=16
4x=16
4x÷4=16÷4
x=4
(13)x÷0.3=9
x×0.3÷0.3=9×0.3
x=2.7
(14)x﹣6=33
x+6﹣6=33+6
x=39
(15)12x﹣9x=8.7
3x=8.7
3x÷3=8.7÷3
x=2.9;
(16)6x+18=483
6x+18﹣18=483﹣18
6x=465
6x÷6=465÷6
x=77.5;
(17)x+2.1=1
x+2.1﹣2.1=1﹣2.1
x=﹣1.1;
(18)0.5x+4.8=7.2
0.5x+4.8﹣4.8=7.2﹣4.8
0.5x=2.4
0.5x÷0.5=2.4÷0.5
x=4.8.
(19)42+4x=54
42+4x﹣42=54﹣42
4x=12
4x÷4=12÷4
x=3;
(20)6x﹣28.5=7.5
6x﹣28.5+28.5=7.5+28.5
6x=36
6x÷6=36÷6
x=6;
(21)6y+3y=13.5
9y=13.5
9y÷9=13.5÷9
y=1.5.
(22)8.5x﹣2.8x=18.24
5.7x=18.24
5.7x÷5.7=18.24÷5.7
x=3.2
(23)x÷1.2=0.4
x÷1.2×1.2=0.4×1.2
x=0.48
(24)9x+8=71
9x+8﹣8=71﹣8
9x=63
9x÷9=63÷9
x=7
(25)x÷3=4
x÷3×3=4×3
x=12;
(26)740﹣x=410
740﹣x+x=410+x
x+410﹣410=740﹣410
x=330;
(27)0.8X=0.56
0.8X÷0.8=0.56÷0.8
x=0.7;
(28)8÷x=9
8÷x×x=9x
9x÷9=8÷9
x=
;
(29)x﹣7.25=0.54
x﹣7.25+7.25=0.54+7.25
x=7.79;
(30)3.7+x=10.5
3.7+x﹣3.7=10.5﹣3.7
x=6.8
(31)x+8.9=37.5
x+8.9﹣8.9=37.5﹣8.9
x=28.6;
(32)x÷6=7.05
x÷6×6=7.05×6
x=42.3;
(33)12x=14.4
12x÷12=14.4÷12
x=1.2
(34)4x+6.7=8.7
4x+6.7﹣6.7=8.7﹣6.7
4x=2
x=0.5
(35)5.5x﹣1.3x=12.6
(5.5﹣1.3)x=12.6
4.2x=12.6
x=3
(36)x÷10=25
x÷10×10=25×10
x=250
(37)4x﹣1.2=74
4x﹣1.2+1.2=74+1.2
4x=75.2
4x÷4=75.2÷4
x=18.8
(38)x+3.2=7.4
x+3.2﹣3.2=7.4﹣3.2
x=4.2
(39)x÷3=1.4
x÷3×3=1.4×3
x=4.2
(40)0.15x﹣3.8=8.5
0.15x﹣3.8+3.8=8.5+3.8
0.15x=12.3
0.15x÷0.15=12.3÷0.15
x=82
(41)2(x﹣0.5)=1.6
2(x﹣0.5)÷2=1.6÷2
x﹣0.5+0.5=0.8+0.5
x=1.3
(42)7x﹣2x=14.6
5x=14.6
5x÷5=14.6÷5
x=2.92
(43)10n+5n=0.6
15n=0.6
15n÷15=0.6÷15
n=0.04
(44)7y+6=41
7y+6﹣6=41﹣6
7y=35
7y÷7=35÷7
y=5
(45)x﹣7.8=10.2
x﹣7.8+7.8=10.2+7.8
x=18;
(46)1.8x=2.16
1.8x÷1.8=2.16÷1.8
x=1.2
(47)2(x+1.7)=9.2
2(x+1.7)÷2=9.2÷2
x+1.7﹣1.7=4.6﹣1.7
x=2.9
(48)8x﹣4x=0.64
4x=0.64
4x÷4=0.64÷4
x=0.16
(49)2x﹣0.24=0.12
2x﹣0.24+0.24=0.12+0.24
2x=0.36
2x÷2=0.36÷2
x=0.18
(50)7x+2.5x=3.8
9.5x=3.8
9.5x÷9.5=3.8÷9.5
x=0.4
(51)20x=70
20x÷20=70÷20
x=3.5;
(52)0.55x﹣0.3x=15
0.25x=15
0.25x÷0.25=15.25÷0.25
x=61;
(53)135﹣x+20=120
155﹣x=120
155+x﹣x=120+x
120+x=155
120﹣120+x=155﹣120
x=35;
(54)x﹣0.036=1.28
x+0.036﹣0.036=1.28+0.036
x=1.316;
(55)10x+25=100
10x+25﹣25=100﹣25
10x=75
10x÷10=75÷10
x=7.5;
(56)32x+18x=120
50x=120
50x÷50=120÷50
x=2.4;
(57)x﹣0.6x=18
0.4x=18
0.4x÷0.4=18÷0.4
x=45;
(58)0.4x+30=80
0.4x+30﹣30=80﹣30
0.4x=50
0.4x÷0.4=50÷0.4
x=125.
(59)6x+18=48
6x+18﹣18=48﹣18
6x=30
6x÷6=30÷6
x=5;
(60)x+2.6x=7.2
3.6x=7.2
3.6x÷3.6=7.2÷3.6
x=2;
(61)12x﹣9x=8.7
3x=8.7
3x÷3=8.7÷3
x=2.9;
(62)3(x+2.1)=10.5
3(x+2.1)÷3=10.5÷3
x+2.1=3.5
x+2.1﹣2.1=3.5﹣2.1
x=1.4.
(63)x+523=523
x+523﹣523=523﹣523
x=0;
(64)x×201=201
x×201÷201=201÷201
x=1;
(65)x÷22=484
x÷22×22=484×22
x=10648;
(66)x﹣125=315
x﹣125+125=315+125
x=440.
(67)8x﹣2x=42
6x=42
6x÷6=42÷6
x=7
(68)5x﹣7×12=41
5x﹣84=41
5x﹣84+84=41+84
5x÷5=125÷5
x=25
(69)x÷6=1.5
x÷6×6=1.5×6
x=9
(70)2x+5=40
2x+5﹣5=40﹣5
2x÷2=35÷2
x=17.5
(71)2.2x+7.8x=15.36
10x=15.36
10x÷10=15.36÷10
x=1.536
(72)9x﹣5x=36
4x=36
4x÷4=36÷4
x=9
(73)75x+25x=315
100x=315
100x÷100=315÷100
x=3.15;
(74)x+2.1x=930
3.1x=930
3.1x÷3.1=930÷3.1
x=300;
(75)0.6x+x=240
1.6x=240
1.6x÷1.6=240÷1.6
x=150;
(76)x﹣0.65x=14
0.35x=14
0.35x÷0.35=14÷0.35
x=40;
(77)x﹣0.4x=240
0.6x=240
0.6x÷0.6=240÷0.6
x=400;
(78)9x+0.3x=18.6
9.3x=18.6
9.3x÷9.3=18.6÷9.3
x=2;
(79)16x﹣40=440
16x﹣40+40=440+40
16x=480
16x÷16=480÷16
x=30.
(80)5x+45=300
5x+45﹣45=300﹣45
5x÷5=255÷5
x=51
(81)8x﹣13.6=0
8x﹣13.6+13.6=0+13.6
8x÷8=13.6÷8
x=1.7
(82)0.9x+4=22
0.9x+4﹣4=20﹣4
0.9x÷0.9=18÷0.9
x=20
(83)6ⅹ+4ⅹ﹣11=2.9
10ⅹ﹣11+11=2.9+11
10ⅹ÷10=13.9÷10
x=1.39.
(84)5x﹣4.2=6.3
5x﹣4.2+4.2=6.3+4.2
5x=10.5
5x÷5=10.5÷5
x=2.1;
(85)x÷1.2=4.8
x÷1.2×1.2=4.8×1.2
x=5.76;
(86)x﹣0.6x=0.24
0.4x=0.24
0.4x÷0.4=0.24÷0.4
x=0.6
(87)6+x=78
6+x﹣6=78﹣6
x=72;
(88)6x﹣35=13
6x﹣35+35=13+35
6x=48
6x÷6=48÷6
x=8;
(89)12x﹣9x=8.7
3x=8.7
3x÷3=8.7÷3
x=2.9;
(90)9×(x﹣2)=36
9×(x﹣2)÷9=36÷9
x﹣2=4
x﹣2+2=4+2
x=6.
(91)5.6x﹣8.6=19.4
5.6x﹣8.6+8.6=19.4+8.6
5.6x=28
5.6x÷5.6=28÷5.6
x=5;
(92)3.2x﹣1.5x=0.51
1.7x=0.51
1.7x÷1.7=0.51÷1.7
x=0.3;
(93)2x+1.2×5=7
2x+6=7
2x+6﹣6=7﹣6
2x=1
2x÷2=1÷2
x=0.5;
(94)5.6x=11.2
5.6x÷5.6=11.2÷5.6
x=2
(95)2x+1.6=3.4
2x+1.6﹣1.6=3.4﹣1.6
2x=1.8
2x÷2=1.8÷2
x=0.9
(96)12.5x+x=108
13.5x=108
13.5x÷13.5=108÷13.5
x=8
(97)3x﹣4×6.5=7.6
3x﹣26=7.6
3x﹣26+26=7.6+26
3x=33.6
3x÷3=33.6÷3
x=11.2
(98)x÷1.44=2
x÷1.44×1.44=2×1.44
x=2.88
(99)5x+1.5=4.5
5x+1.5﹣1.5=4.5﹣1.5
5x=3
5x÷5=3÷5
x=0.6;
(100)5x﹣3.5x=6
1.5x=6
1.5x÷1.5=6÷1.5
x=4.
(101)6.8+2x=24.3
6.8+2x﹣6.8=24.3﹣6.8
2x÷2=17.5÷2
x=8.75;
(102)7x÷0.7=8.8
10x=8.8
10x÷10=8.8÷10
x=0.88;
(103)3x﹣213=45
3x﹣213+213=45+213
3x÷3=258÷3
x=86;
(104)2.8x+3.4x=9.92
6.2x=9.92
6.2x÷6.2=9.92÷6.2
x=1.6;
(105)23x﹣3×23=138
23x﹣69+69=138+69
23x÷23=207÷23
x=9;
(106)4.2x﹣2.4x=12.6
1.8x=12.6
1.8x÷1.8=12.6÷1.8
x=7;
(107)7x﹣3.8×2=8.5
7x﹣7.6+7.6=8.5+7.6
7x÷7=16.1÷7
x=2.3;
(108)9x﹣1.8×0.4=9
9x﹣0.72+0.72=9+0.72
9x÷9=9.72÷9
x=1.08.
(109)3x﹣2.4=3.6
3x﹣2.4+2.4=3.6+2.4
3x=6
3x÷3=6÷3
x=2;
(110)2x+9=33
2x+9﹣9=33﹣9
2x=24
2x÷2=24÷2
x=12;
(111)x﹣0.85x=3
0.15x=3
0.15x÷0.15=3÷0.15
x=20.
(112)40+2x=220
40+2x﹣40=220﹣40
2x=180
2x÷2=180÷2
x=90;
(113)4x﹣6=28
4x﹣6+6=28+6
4x÷4=34÷4
x=8.5;
(114)4x﹣2x=48
2x=48
2x÷2=48÷2
x=24;
(115)2x÷9=25
2x÷9×9=25×9
2x=225
2x÷2=225÷2
x=112.5;
(116)2y+3y+6=14.2
5y+6=14.2
5y+6﹣6=14.2﹣6
5y=8.2
5y÷5=8.2÷5
y=1.64.
(117)5.34+X=26.7
5.34+X﹣5.34=26.7﹣5.34
X=21.36;
(118)X﹣24.5=6.48
X﹣24.5+24.5=6.48+24.5
X=30.98;
(119)X+2X=45
3X=45
3X÷3=45÷3
X=15;
(120)X÷0.6=4.5
X÷0.6×0.6=4.5×0.6
X=2.7.