文档文本内容
五年级数学上册专项训练——解方程 100 题
学校: 班级: 姓名:
1.解方程
4x+9=249 x-0.36x=16 3.5x-1.75=3.85
2(x+1.7)=9.2 8.5x-2.5x=24.6 3×0.5+6x=3.3
2.解方程
x-5.4=7.8 x÷0.8=2.5 3(x-6)=27
3x﹣6×4.5=1 4.1x+2.2x=2.9 69.8﹣2x=3.4
3.解方程
2×(5+x)=36 x+12.5×6=126.5 6.3x-x=15.9
0.4x =192 5.4÷x=3 6.2x+23=41.64.解方程
7.8x-2.4x=1.08 x-63=36 1.5×3+6x=33
3.27x+6.73x=36.3 6.3÷x=7 3.5×6+3x=22.5
5.解方程
2(x-3)=11.6 4x-3×1.2=15.6 (1.2+x)×5=7.5
8x+5.6=37.6 x-0.25x=75 0.75x-0.5x=1
6.解方程
3.4x=17 8x-0.8×2=5.6 *5x+5.5=7
6×4-5x=12.8 (x-3)÷3.2=4 4(x+2)=967.解方程
x-0.36x=16 8x-4.7x=13.2 6.5(x+3.8)=34.45
4x-3×0.9=2.9 (x-3)÷6.5=8 3.7 x+5 x=139.2
8.解方程
6(x+4)=93.6 1.7x-26.8=48 56+2x=98.2
52x+15x=13.4 1.2(x-5)=6.6 12.8x-5.7x=56.8
9.解方程
8x+18.6=56.2 4(x-5.3)=38.8 3.85+1.5x=6.1
6x-0.9=4.5 3.6x-x=32.5 5x=7510.解方程
7x=112 13x=169 35x=245
5.7x=19.95 0.8x=100.8 21x=495.6
11.解方程
0.3x=86.13 49x=539 2.8x=53.2
x+23=58 x-59=156 x+10.6=36.98
12.解方程
x-27.05=45.37 x+102=139 x-9.8=32.3
23.5+x=34.9 x-33.1=15.26 16.5+x=75.913.解方程
x-311+=406 76.02-x=18.89 12.31-x=7.23
103.7-x=26.59 53.2-x=27.9 81.3-x=56.32
14.解方程
99-x=37.18 36.2-x=29.5 263.3-x=156
1.3=5.6-x 129-x=100.8 3x+12.6=19.2
15.解方程
6x+10.8=15.4+2.6 32+2x-25=19 4x+22.8=50.6
2x-3.8=15.8 7x+50=92 12+3.7x=4916.解方程
50+5x-5=91 15.5x-3x=8 6.7x+1.3x=26.4
x-3×1.5=20.9 x-5×1.2=18
20.2+x-12.5=13×2
17.解方程
x+14×2=36.7 x-32.5=3.8×9 26×4+x-18=106.5
x-58+6÷2=76答案解析部分
【答案】 4x+9=249
解:4x+9-9=249-9
4x=240
4x÷4=240÷4
x=60
x-0.36x=16
解:0.64x=16
0.64x÷0.64=16÷0.64
x=25
【答案】3.5x-1.75=3.85
解:3.5x=3.85+1.75
3.5x=5.6
x=5.6÷3.5
x=1.6
2(x+1.7)=9.2
解:x+1.7=9.2÷2
x+1.7=4.6
x=4.6-1.7
x=2.9
8.5x-2.5x=24.6
解:6x=24.6
x=24.6÷6
x=4.1
3×0.5+6x=3.3
解:1.5+6x=3.3
6x=3.3-1.5
6x=1.8
x=1.8÷6
x=0.3
【答案】 x-5.4=7.8
解:x-5.4+5.4=7.8+5.4x=13.2
x÷0.8=2.5
解:x÷0.8×0.8=2.5×0.8
x=2
3(x-6)=27
解:x-6=9
x-6+6=9+6
x=15
【答案】解:3x-27+27=1+27
3x÷3=28÷3
x=
28
解:6.3x=2.9 3
6.3x÷6.3=2.9÷6.3
x=
29
解:69.8﹣2x+2x=633.4+2x
3.4+2x﹣3.4=69.8﹣3.4
2x÷2=66.4÷2
x=33.2
【答案】 2×(5+x)=36
解:2×(5+x)÷2=36÷2
5+x=18
5+x-5=18-5
x=13
x+12.5×6=126.5
解:x+75=126.5
x+75-75=126.5-75
x=51.5
6.3x-x=15.9
解:5.3x=15.9
5.3x÷5.3=15.9÷5.3
x=3【答案】 0.4x=192
解:0.4x÷0.4=192÷0.4
x=480
5.4÷x=3
解:5.4÷x×x=3x
3x=5.4
3x÷3=5.4÷3
x=1.8
6.2x+23=41.6
解: 6.2x+23-23=41.6-23
6.2x=18.6
6.2x÷6.2=18.6÷6.2
x=3
(4)7.8x-2.4x=1.08
解: 5.4x=1.08
5.4x÷5.4=1.08÷5.4
x=0.2
【答案】 x-63=36
解: x-63+63=36+63
x=99
1.5×3+6x=33
解:4.5+6x=33
4.5+6x-4.5=33-4.5
6x=28.5
6x÷6=28.5÷6
x=4.75
3.27x+6.73x=36.3
解:10x=36.3
10x÷10=36.3÷10
x=3.63
【答案】6.3÷x=7
解:x=6.3÷7x=0.9
3.5×6+3x=22.5
解:21+3x=22.5
3x=22.5-21
3x=1.5
x=1.5÷3
x=0.5
2(x-3)=11.6
解:x-3=11.6÷2
x-3=5.8
x=5.8+3
x=8.8
【答案】 4x-3×1.2=15.6
解:4x-3.6=15.6
4x-3.6+3.6=15.6+3.6
4x=19.2
4x÷4=19.2÷4
x=4.8
(1.2+x)×5=7.5
解:(1.2+x)×5÷5=7.5÷5
1.2+x=1.5
1.2+x-1.2=1.5-1.2
x=0.3
【答案】 8x+5.6=37.6
解:8x+5.6-5.6=37.6-5.6
8x=32
8x÷8=32÷8
x=4
x-0.25x=75
解:0.75x=75
0.75x÷0.75=75÷0.75
x=100【答案】 0.75x-0.5x=1
解:0.25x=1
0.25x÷0.25=1÷0.25
x=4
3.4x=17
解:3.4x÷3.4=17÷3.4
x=5
8x-0.8×2=5.6
解:8x-1.6=5.6
8x-1.6+1.6=5.6+1.6
8x=7.2
8x÷8=7.2÷8
x=0.9
【答案】 5x+5.5=7
解:5x+5.5-5.5=7-5.5
5x=1.5
5x÷5=1.5÷5
x=0.3
6×4-5x=12.8
解:24-5x=12.8
24-5x+5x=12.8+5x
12.8+5x=24
12.8+5x-12.8=24-12.8
5x=11.2
5x÷5=11.2÷5
x=2.24
(x-3)÷3.2=4
解:(x-3)÷3.2×3.2=4×3.2
x-3=12.8
x-3+3=12.8+3
x=15.8
【答案】4(x+2)=96解:x+2=96÷4
x+2=24
x=24-2
x=22
x-0.36x=16
解:0.64x=16
x=16÷0.64
x=25
【答案】 8x-4.7x=13.2
解:3.3x=13.2
3.3x÷3.3=13.2÷3.3
x=4
6.5(x+3.8)=34.45
解:6.5(x+3.8)÷6.5=34.45÷6.5
x+3.8=5.3
x+3.8-3.8=5.3-3.8
x=1.5
4x-3×0.9=2.9
解:4x-2.7=2.9
4x-2.7+2.7=2.9+2.7
4x=5.6
4x÷4=5.6÷4
x=1.4
【答案】(x-3)÷6.5=8
解:x-3=8×6.5
x-3=52
x=52+3
x=55
3.7x+5x=139.2
解:8.7x=139.2
x=139.2÷8.7
x=166(x+4)=93.6
解:x+4=93.6÷6
x+4=15.6
x=15.6-4
x=11.6
【答案】 1.7x-26.8=48
解:1.7x-26.8+26.8=48+26.8
1.7x=74.8
1.7x÷1.7=74.8÷1.7
x=44
56+2x=98.2
解:56+2x-56=98.2-56
2x=42.2
2x÷2=42.2÷2
x=21.1
52x+15x=13.4
解:67x=13.4
67x÷67=13.4÷67
x=0.2
(4) 1.2(x-5)=6.6
解:1.2(x-5)÷1.2=6.6÷1.2
x-5=5.5
x-5+5=5.5+5
x=10.5
【答案】12.8x-5.7x=56.8
解:7.1x=56.8
x=56.8÷7.1
x=8
8x+18.6=56.2
解:8x=56.2-18.6
8x=37.6
x=37.6÷8x=4.7
4(x-5.3)=38.8
解:x-5.3=38.8÷4
x-5.3=9.7
x=9.7+5.3
x=15
【答案】 3.85+1.5x=6.1
解:3.85+1.5x-3.85=6.1-3.85
1.5x=2.25
1.5x÷1.5=2.25÷1.5
x=1.5
6x-0.9=4.5
解:6x-0.9+0.9=4.5+0.9
6x=5.4
6x÷6=5.4÷6
x=0.9
3.6x-x=32.5
解:2.6x=32.5
2.6x÷2.6=32.5÷2.6
x=12.55x=75
解:x=75÷5
x=15
7x=112
解:x=112÷7
x=16
13x=169
解:x=169÷13
x=13
35x=245
解:x=245÷35
x=7
5.7x=19.95
解:x=19.95÷5.7
x=3.5
0.8x=100.8
解:x=100.8÷0.8
x=126
21x=495.6
解:x=495.6÷21
x=23.6
0.3x=86.13
解:x=86.13÷0.3
x=287.1
49x=539
解:x=539÷49x=11
2.8x=53.2
解:x=53.2÷2.8
x=19
x+23=58
解:x=58-23
x=35
x-59=156
解:x=156+59
x=215
x+10.6=36.98
解:x=36.98-10.6
x=26.38
x-27.05=45.37
解:x=45.37+27.05
x=72.42
x+102=139
解:x=139-102
x=37
x-9.8=32.3
解:x=32.3+9.8
x=42.1
23.5+x=34.9
解:x=34.9-23.5
x=11.4x-33.1=15.26
解:x=15.26+33.1
x=48.36
16.5+x=75.9
解:x=75.9-16.5
x=59.4
x-311+=406
解:x=406+311
x=717
76.02-x=18.89
解:76.02-18.89=x
57.13=x
x=57.13
12.31-x=7.23
解:12.31-7.23=x
5.08=x
x=5.08
103.7-x=26.59
解:103.7-26.59=x
77.11=x
x=77.11
53.2-x=27.9
解:53.2-27.9=x
25.3=x
x=25.381.3-x=56.32
解:81.3-56.32=x
24.98=x
x=24.98
99-x=37.18
解:99-37.18=x
61.82=x
x=61.82
36.2-x=29.5
解:36.2-29.5=x
6.7=x
x=6.7
263.3-x=156
解:263.3-156=x
107.3=x
x=107.3
1.3=5.6-x
解: x=5.6-1.3
x=4.3
129-x=100.8
解:129-100.8=x
28.2=x
x=28.2
3x+12.6=19.2
解:3x=19.2-12.6
3x=6.6
x=6.6÷3x=2.2
6x+10.8=15.4+2.6
解:6x=18-10.8
6x=7.2
x=7.2÷6
x=1.2
32+2x-25=19
解:2x+7=19
2x=19-7
2x=12
x=12÷2
x=6
4x+22.8=50.6
解:4x=50.6-22.8
4x=27.8
x=27.8÷4
x=6.95
2x-3.8=15.8
解:2x=15.8+3.8
2x=19.6
x=19.6÷2
x=9.8
7x+50=92
解:7x=92-50
7x=42
x=42÷7
x=612+3.7x=49
解:3.7x=75.3-38.3
3.7x=37
x=37÷3.7
x=10
50+5x-5=91
解:45+5x=91
5x=91-45
5x=46
x=46÷5
x=9.2
15.5x-3x=8
解:12.5x=8
x=8÷12.5
x=0.64
6.7x+1.3x=26.4
解:8x=26.4
x=26.4÷8
x=3.3
x-3×1.5=20.9
解:x-4.5=20.9
x=20.9+4.5
x=25.4
x-5×1.2=18
解:x-6=18
x=18+6
x=2420.2+x-12.5=13×2
解:x+7.7=26
x=26-7.7
x=18.3
x+14×2=36.7
解:x+28=36.7
x=36.7-28
x=8.7
x-32.5=3.8×9
解:x-32.5=34.2
x=34.2+32.5
x=66.7
26×4+x-18=106.5
解:104+x-18=106.5
86+x=106.5
x=106.5-86
x=20.5
x-58+6÷2=76
解: x-58+3=76
x=76+58-3
x=131