六年级数学解方程100道
重阳节简报-费用管理办法
 
 
六年级解方程
100
道
一、计算题(共
20
题;共
470
分)
1.
解下列方程。
   
①4
+
x=8.6
②x-1.5=2.7 
③0.6x=1.26 
④27x+5x=128
⑤1.5+2x=11.5 
⑥25+6x=79 
2.
解方程
(
1
)
5x
-
2
+
1.8
=3.6     
(
2
)
7
(
x
-
1
.2
)=
2.1     
3.
解方程.
(
1
)
x+0.8
=
7.6
(
2
)
6.2x
﹣
x
=
41.6
(
3
)
5.58÷x
=
3.1
(
4
)
4x
﹣
97
=
34.2
4.
解方程.
(
1
)
x÷0.26
=
10
(
2
)
x÷0.26
=
10
(
3
)
1.4x+9.2x
=
53
(
4
)
1.4x+9.2x
=
53     
(<
br>5
)
4
(
x
﹣
0.7
)=
26
(
6
)
4
(
x
﹣
0.7
)=26     
5.
解方程。
(
1
)
13x-7.5x=18.7
(
2
)
13x-7.5x=18.7
(
3
)
4
(
x-7.3
)
=32.8
(
4
)
4
(
x-7.3
)
=32.8
6.
解方程。
     
(
1
)
2.4×3+5
=15.2     
(
2
)
7.5÷x=3
(
3
)
2.4×3+5  =15.2
(
4
)
9.6x-8x=7.2
(
5
)
9.6x-8x=7.2     
(
6
)
4
(
x+0.9
)
=12.8
(
7
)
4
(
x+0.9
)
=12.8
7.
解方程.
     
(
1
)
x+  =
     
(
2
)
x+  =  
(
3
)
 x
=
(
4
)
 x
=
(
5
)
8x+  
=
(
6
)
8x+  
=
8.
解方程.(第
②
题写出检验过程)
(
1
)
5x
﹣
3.7
=
4.8
(
2
)
5x
﹣
3.7
=
4.8     
(
3
)
6
(
y
﹣
1.2
)=4.2     
(
4
)
6
(
y
﹣
1
.2
)=
4.2     
9.
解下列方程.
(
1
)
2x+1.5x
=
17.5     
(<
br>2
)
6
(
x
﹣
1.5
)=
15
(
3
)(
x
﹣
8
)
÷2.9
=<
br>7
(
4
)
3x
﹣
4×6.5
=
7.6
10.
解下列方程
(
1
)
5+2.5x
=
62.5     
(2
)(
2x
﹣
6
)
÷2
=
24
(
3
)
5x+12×3
=
56
11.
解方程。
(
1
)
x÷4.5=18
(
2
)
x÷4.5=18
(
3
)
6.2-x=0.45
(
4
)
6.2-x=0.45     
 
(
5
)
8
(
x-3
)
=40.8
(
6
)
8
(
x-3
)
=40.8
12.
解方程。
(
1
)
3x+1.2=4
(
2
)
3x+1.2=4
(
3
)
1.5x-0.5=4
(
4
)
1.5x-0.5=4
(
5
)
5.6x-3.2x=60
(
6
)
5.6x-3.2x=60
13.
解方程。
(
1
)
37-x=1.8
(
2
)
2x +23×4=134
(
3
)(
x-3
)
÷2=7.5
14.
解方程。(带
★
要检验)
(
1
)
9.7x-5.3x=13.2
(
2
)
9.7x-5.3x=13.2
(
3
)
4
(
1.5-x
)
=2.4
(
4
)
4
(
1.5-x
)
=2.4
(
5
)
★12÷x=0.6
(
6
)
★12÷x=0.6
15.
解下列方程。
(
1
)
2x+1.5x=17.5
(
2
)
2x+1.5x=17.5
(
3
)
6
(
x-1.5
)
=15
(
4
)
6
(
x-1.5
)
=15
(
5
)(
x-8
)
÷2.9=7
(
6
)(
x-8
)
÷2.9=7
(
7
)
3x-4×6.5=7.6
(
8
)
3x-4×6.5=7.6
16.
解方程
     
(
1
)
9.6÷x=8
(
2
)
9.6÷x=8
(
3
)
x-0.2x=16
(
4
)
x-0.2x=16
(
5
)
3
(
x+2.1
)
=10.5
(
6
)
3
(
x+2.1
)
=10.5
17.
解方程。
(
1
)
4x+3.6=9.6
(
2
)
4x+3.6=9.6     
 
(
3
)
12.8x-5.7x=35.5
(
4
)
12.8x-5.7x=35.5
(
5
)
5
(
x+6
)
=45
(
6
)
5
(
x+6
)
=45
18.
解方程。
(
1
)
x-7.9=2.6 
(
2
)
1.4x+9.2x=53 
(
3
)
6.8+3.2x=14.8 
19.
利用等式性质解下列方程
     
(
1
)
3
(
x-1
)
=27
(写出此方程的检验过程)
(
2
)
4x+14=50     
(
3
)
3
(
x-1
)
=27
(写出此方程的检验过程)
20.
解方程(加
※
检验)
(
1
)
※5x-7.2=20.2
(
2
)
※5x-7.2=20.2
(
3
)
2.5x-x=1.8
(
4
)
2.5x-x=1.8
(
5
)
4
(
18-x
)
=32.8
(
6
)
4
(
18-x
)
=32.8
 
 
 
答案解析部分
 
一、计算题
1.
【答案】
         ①4
+
x=8.6
解:
4
+
x-4=8.6-4 
x=4.6 
           ②x-1.5=2.7
解:
x-1.5+1.5=2.7+1.5 
x=4.2 
           ③0.6x=1.26
解:
0.6x÷0.6=1.26÷0.6 
x=2.1 
④27x+5x=128 
   
解:
32x=128
               x=4 
          ⑤1.5+2x=11.5
解:
1.5+2x-1.5=11.5-1.5 
2x=10 
                      x=5 
⑥25+6x=79 
解:
25+6x-25=79-25 
6x=54 
                     x=9
2.
【答案】
 
(
1
)
5x
-
2
+
1.8
=
3.6
解:
5x-0.2
=
3.6 
5x
=
3.6+0.2 
         5x
=
3.8
     5x÷5=3.8÷5 
            x=0.76 
(
2
)
7
(
x
-
1.2
)=
2.1 
解:
7
(
x-1.2
)
÷7=2.1÷7 
x-1.2=0.3 
                 x-1.2+1.2=0.3+1.2
                              x=1.5 
3.
【答案】
 
(
1
)
x+0.8
=
7.6 
 
 
解:
x+0.8
﹣
0.8
=
7.6
﹣
0.8 
x
=
6.8 
 
(
2
)
6.2x
﹣
x
=
41.6 
解:
5.2x
=
41.6
5.2x÷5.2
=
41.6÷5.2 
x
=
8 
 
(
3
)
5.58÷x
=
3.1
解:
5.58÷x×x
=
3.1×x 
3.1x
=
5.58 
3.1x÷3.1
=
5.58÷3.1 
x
=
1.8 
 
(
4
)
4x
﹣
97
=
34.2
解:
4x
﹣
97+97
=
34.2+97 
4x
=
131.2 
4x÷4
=
131.2÷4 
x
=
32.8 
4.
【答案】
(
1
)
x÷0.26
=
10
解:
x÷0.26×0.26
=
10×0.26 
x
=
2.6 
 
(
2
)
x÷0.26
=
10
解:
x÷0.26×0.26
=
10×0.26 
x
=
2.6 
 
(
3
)
1.4x+9.2x
=
53 
解:
10.6x
=
53
10.6x÷10.6
=
53÷10.6 
x
=
5 
 
(
4
)
1.4x+9.2x
=
53 
解:
10.6x
=
53
10.6x÷10.6
=
53÷10.6 
x
=
5 
 
(
5
)
4
(
x
﹣
0.7
)=
26 
解:
4
(
x
﹣
0.7
)
÷4
=
26÷4 
 
x
﹣
0.7
=
6.5 
x
﹣
0.7+0.7
=
6.5+0.7 
x
=
7.2 
 
(
6
)
4
(
x
﹣
0.7
)=
26 
解:
4
(
x
﹣
0.7
)
÷4
=
26÷4 
x
﹣
0.7
=
6.5 
x
﹣
0.7+0.7
=
6.5+0.7 
x
=
7.2 
5.
【答案】
(
1
)
13x-7.5x=18.7 
解:
5.5x=18.7 
            x=18.7÷5.5
            x=3.4 
(
2
)
13x-7.5x=18.7 
解:
5.5x=18.7 
            x=18.7÷5.5
            x=3.4 
 
(
3
)
4
(
x-7.3
)
=32.8 
  
解:
x-7.3=32.8÷4 
          x-7.3=8.2 
x=8.2+7.3 
                x=15.5
(
4
)
 4
(
x-7.3
)
=32.8
  
解:
 x-7.3=32.8÷4 
x-7.3=8.2 
                x=8.2+7.3 
x=15.5    
6.
【答案】
 
(
1
)
2.4×3+5  =15.2 
  
解:
7.2
+
5
=
15.2 
7.2
+
5
-
7.2
=
15.2
-
7.2 
5  
=
8 
                    
=
1.6
 
 
 
(
2
)
7.5÷  
=
3 
解:
7.5÷  ×  
=
3×
                   3  
=
7.5 
3  ÷3
=
7.5÷3 
=
2.5 
 
(
3
)
      2.4×3+5
=15.2 
  
解:
7.2
+
5  
=
15.2
7.2
+
5
-
7.2
=
15.2
-
7.2 
5  
=
8 
                    
=
1.6
 
(
4
)
     9.6x-8x=7.2
解:
1.6  
=
7.2 
1.6
÷1.6
=
7.2÷1.6 
=
4.5 
 
(
5
)
9.6x-8x=7.2 
解:
1.6  
=
7.2 
1.6
÷1.6
=
7.2÷1.6 
=
4.5 
 
(
6
)
4
(
x+0.9
)
=12.8 
解:
4
(
+
0.9
)
÷4
=
12.8÷4 
+
0.9
=
3.2 
 
 
+
0.9
-
0.9
=
3.2
-
0.9
                            
=
2.3 
(
7
)
4
(
x+0.9
)
=12.8 
解:
4
(
+
0.9
)
÷4
=
12.8÷4 
+
0.9
=
3.2 
+
0.9
-
0.9
=
3.2
-
0.9
                            
=
2.3
7.
【答案】
 
(
1
)
x+  
=
  
解:
x+  
﹣
  
=
﹣
  
                         x
=
 
(
2
)
                x+
=
  
解:
x+  
﹣
  
=
﹣
  
                         x
=
 
(
3
)
      
解:
x
=
  
   x÷  
=
  ÷  
x
=
  
 
 
(
4
)
      
解:
  x
=
   x÷  
=
  ÷  
x
=
  
 
(
5
)
解:
8x+  
=
  
    8x+  
﹣
=
  
﹣
  
8x
=
  
                 8x÷8
=
÷8 
                        x
=
  
(
6
)
       
解:
8x+  
=
    8x+  
﹣
  
=
  
﹣
  
8x
=
  
                 8x÷8
=
÷8 
                        x
=
8.
【答案】
 
(
1
)
5x
﹣
3.7
=
4.8
解:
5x
﹣
3.7
=
4.8
5x
﹣
3.7+3.7
=
4.8+3.7 
 
                5x
=
8.5
           5x÷5
=
8.5÷5 
x
=
1.7 
 
(
2
)
5x
﹣
3.7
=
4.8
解:
5x
﹣
3.7
=
4.8
5x
﹣
3.7+3.7
=
4.8+3.7 
5x
=
8.5 
           5x÷5
=
8.5÷5
                 x
=
1.7 
(
3
)
 
6
(
y
﹣
1.2
)=
4.2
解:
6
(
y
﹣
1.2
)=
4.2
6
(
y
﹣
1.2
)
÷6
=
4.2÷6
                y
﹣
1.2
=
0.7 
y
﹣
1.2+1.2
=
0.7+1.2 
y
=
1.9 
 
验算:
 
把
y=1.9
代
入原方程
6
(
y
﹣
1.2
)=
4.2
,<
br> 
左边
=6×
(
1.9-1.2
)
=6×0.7 
=4.2 
右边
=4.2
左边
=
右边
 
所以,
y=1.9
是方程
6
(
y
﹣
1.2
)=
4.2
的解。
(
4
)
 
6
(
y
﹣
1.2
)=
4.2
解:
6
(
y
﹣
1.2
)=
4.2
6
(
y
﹣
1.2
)
÷6
=
4.2÷6
                y
﹣
1.2
=
0.7 
y
﹣
1.2+1.2
=
0.7+1.2 
y
=
1.9 
 
验算:
 
把
y=1.9
代
入原方程
6
(
y
﹣
1.2
)=
4.2
,<
br> 
左边
=6×
(
1.9-1.2
)
=6×0.7 
=4.2 
右边
=4.2 
 
左边
=
右边
 
所以,
y=1.9
是方程
6
(
y
﹣
1.2
)=
4.2
的解。
    
9.
【答案】
(
1
)
2x+1.5x
=
17.5
解:
3.5x
=
17.5
3.5x÷3.5
=
17.5÷3.5 
x
=
5 
 
(
2
)
6
(
x
﹣
1.5
)=
15 
解:
6
(
x
﹣
1.5
)
÷6
=
15÷6 
x
﹣
1.5
=
2.5 
x
﹣
1.5+1.5
=
2.5+1.5 
x
=
4 
 
(
3
)
(
x
﹣
8
)
÷2.9
=
7 
解:
(
x
﹣
8
)
÷2.9×2.9
=
7×2.9
x
﹣
8
=
20.3 
x
﹣
8+8
=
20.3+8 
x
=
28.3 
 
(
4
)
3x
﹣
4×6.5
=
7.6
解:
3x
﹣
26
=
7.6
3x
﹣
26+26
=
7.6+26 
3x
=
33.6 
         3x÷3
=
33.6÷3
                x
=
11.2
10.
【答案】
 
(
1
)
5+2.5x
=
62.5
解:
5+2.5x
﹣
5
=
62.5
﹣
5
                   2.5x
=
57.5 
2.5x÷2.5
=
57.5÷2.5 
x
=
23 
 
(
2
)
(
2x
﹣
6
)
÷2
=
24
解:(
2x
﹣
6
)
÷2×2
=
24×2
                      2x
﹣
6
=
48
                  2x
﹣
6+6
=
48+6
                           2x
=
54 
2x÷2
=
54÷2 
x
=
27 
 
 
(
3
)
  5x+12×3
=
56
解:
5x+36
=
56
5x+36
﹣
36
=
56
﹣
36 
5x
=
20 
        5x÷5
=
20÷5 
x
=
4 
11.
【答案】
(
1
)
               x÷4.5=18
解:
 x÷4.5×4.5=18×4.5 
x=81 
 
(
2
)
x÷4.5=18 
解:
 x÷4.5×4.5=18×4.5 
x=81 
 
(
3
)
6.2-x=0.45 
解:
 6.2-x+x=0.45+x 
0.45+x=6.2 
  0.45+x-0.45=6.2-0.45 
x=5.75 
 
(
4
)
6.2-x=0.45 
解:
 6.2-x+x=0.45+x 
0.45+x=6.2 
  0.45+x-0.45=6.2-0.45 
x=5.75 
 
(
5
)
8
(
x-3
)
=40.8 
解:
8
(
x-3
)
÷8=40.8÷8 
x-3=5.1 
                 x-3+3=5.1+3 
x=8.1 
(
6
)
8
(
x-3
)
=40.8 
解:
8
(
x-3
)
÷8=40.8÷8 
x-3=5.1 
                 x-3+3=5.1+3 
x=8.1    
12.
【答案】
(
1
)
3x+1.2=4 
解:
3x=4-1.2 
 
 
3x=2.8 
          x=2.8÷3 
          x=
(
2
)
3x+1.2=4 
解:
3x=4-1.2 
        3x=2.8 
x=2.8÷3 
          x= 
(
3
)
1.5x-0.5=4 
解:
1.5x=4+0.5 
1.5x=4.5 
            x=4.5÷1.5 
x=3 
(
4
)
 1.5x-0.5=4
解:
1.5x=4+0.5 
       1.5x=4.5 
x=4.5÷1.5 
            x=3
(
5
)
5.6x-3.2x=60 
解:
2.4x=60 
            x=60÷2.4 
x=25 
(
6
)
5.6x-3.2x=60 
解:
2.4x=60 
            x=60÷2.4 
x=25    
13.
【答案】
 
(
1
)
解:
 37-x+x=1.8+x 
          1.8+x=37
    1.8+x-1.8=37-1.8 
x=35.2 
 
(
2
)
 2x +23×4=134
解:
2x+92=134 
  2x+92-92=134-92 
2x=42 
 
37-x=1.8 
 
2x÷2=42÷2 
                x=21 
(
3
)
(
x-3
)
÷2=7.5    
解:
(
x-3
)
÷2×2=7.5×2 
x-3=15 
                    x-3+3=15+3 
x=18     
14.
【答案】
(
1
)
9.7x-5.3x=13.2 
解:
4.4x=13.2 
            x=13.2÷4.4
            x=3
(
2
)
9.7x-5.3x=13.2 
解:
4.4x=13.2 
            x=13.2÷4.4
            x=3
(
3
)
4
(
1.5-x
)
=2.4
  
解:
1.5-x=2.4÷4 
         1.5-x=0.6
               x=1.5-0.6 
x=0.9
(
4
)
4
(
1.5-x
)
=2.4
  
解:
1.5-x=2.4÷4 
         1.5-x=0.6
               x=1.5-0.6 
x=0.9 
(
5
)
12÷x=0.6
解:
x=12÷0.6 
       x=20 
(
6
)
12÷x=0.6 
解:
x=12÷0.6
       x=20 
    
15.
【答案】
(
1
)
  2x+1.5x=17.5 
解:
3.5x=17.5 
3.5x÷3.5=17.5÷3.5 
x=5 
(
2
)
  2x+1.5x=17.5 
 
 
解:
3.5x=17.5
3.5x÷3.5=17.5÷3.5 
            x=5
(
3
)
6
(
x-1.5
)
=15 
解:
6
(
x-1.5
)
÷6=15÷6 
x-1.5=2.5 
             x-1.5+1.5=2.5+1.5 
x=4 
(
4
)
6
(
x-1.5
)
=15 
解:
6
(
x-1.5
)
÷6=15÷6 
x-1.5=2.5 
             x-1.5+1.5=2.5+1.5 
x=4 
(
5
)
(
x-8
)
÷2.9=7 
解:
(
x-8
)
÷2.9×2.9=7×2.9 
x-8=20.3 
                        x-8+8=20.3+8
                                x=28.3 
(
6
)
(
x-8
)
÷2.9=7 
解:
(
x-8
)
÷2.9×2.9=7×2.9 
x-8=20.3 
                        x-8+8=20.3+8
                                x=28.3 
(
7
)
  3x-4×6.5=7.6
解:
3x-26=7.6 
3x-26+26=7.6+26 
3x=33.6 
      3x÷3=33.6÷3 
x=11.2 
(
8
)
  3x-4×6.5=7.6
解:
3x-26=7.6 
3x-26+26=7.6+26 
3x=33.6 
      3x÷3=33.6÷3 
x=11.2    
16.
【答案】
(
1
)
9.6÷x=8 
解:
x=9.6÷8 
 
       x=1.2
(
2
)
9.6÷x=8 
解:
x=9.6÷8 
x=1.2 
(
3
)
    x-0.2x=16
解:
0.8x=16 
            x=20
(
4
)
    x-0.2x=16 
解:
0.8x=16
            x=20
(
5
)
3
(
x+2.1
)
=10.5
  
解:
x+2.1=10.5÷3 
x+2.1=3.5 
                x=3.5-2.1 
x=1.4
(
6
)
3
(
x+2.1
)
=10.5
  
解:
x+2.1=10.5÷3 
x+2.1=3.5 
                x=3.5-2.1 
x=1.4    
17.
【答案】
(
1
)
4x+3.6=9.6 
解:
4x=9.6-3.6 
        4x=6 
x=6÷4 
          x=1.5
(
2
)
4x+3.6=9.6 
解:
4x=9.6-3.6 
        4x=6 
x=6÷4 
          x=1.5
(
3
)
12.8x-5.7x=35.5 
解:
7.1x=35.5 
              x=35.5÷7.1
              x=5
(
4
)
12.8x-5.7x=35.5 
解:
7.1x=35.5 
              x=35.5÷7.1
              x=5
(
5
)
5
(
x+6
)
=45 
 
   
解:
x+6=45÷5 
x+6=9 
               x=9-6 
x=3 
(
6
)
5
(
x+6
)
=45
   
解:
x+6=45÷5 
           x+6=9
               x=9-6 
               x=3
18.
【答案】
 
(
1
)
x-7.9=2.6 
解:
 x-7.9+7.9=2.6+7.9 
x=10.5 
(
2
)
   1.4x+9.2x=53 
解:
10.6x=53 
10.6x÷10.6=53÷10.6 
x=5 
(
3
)
6.8+3.2x=14.8
解:
3.2x=14.8-6.8 
      3.2x=8 
x=2.5 
    
19.
【答案】
(
1
)
3
(
x-1
)
=27
解:
3
(
x-1
)
÷3=27÷3 
x-1=9 
                x-1+1=9+1 
x=10 
 
(
2
)
            4x+14=50
解:
4x+14-14=50-14 
4x=36 
              4x÷4=36÷4 
x=9 
(
3
)
3
(
x-1
)
=27
解:
3
(
x-1
)
÷3=27÷3 
x-1=9 
                x-1+1=9+1 
x=10 
    
 
 
20.
【答案】
(
1
)
5x-7.2=20.2
解:
5x=20.2+7.2 
       5x=27.4 
x=27.4÷5 
         x=5.48
;
 
检验:
方程的左边
=5x-7.2 
=5×5.48-7.2 
                 =27.4-7.2 
=20.2 
                 =
方程的右边
所以,
x=5.48
是方程的解。
(
2
)
5x-7.2=20.2
解:
5x=20.2+7.2 
       5x=27.4 
x=27.4÷5 
         x=5.48
;
 
检验:
方程的左边
=5x-7.2 
=5×5.48-7.2 
                 =27.4-7.2 
=20.2 
                 =
方程的右边
所以,
x=5.48
是方程的解。
(
3
)
     2.5x-x=1.8 
解:
1.5x=1.8 
            x=1.8÷1.5 
x=1.2 
 
(
4
)
     2.5x-x=1.8
解:
 1.5x=1.8 
            x=1.8÷1.5 
x=1.2 
(
5
)
4
(
18-x
)
=32.8
   
解:
18-x=32.8÷4 
18-x=8.2 
      18-x+x=8.2+x 
18=8.2+x 
 
 
18-8.2=8.2+x-8.2 
              x=9.8 
(
6
)
4
(
18-x
)
=32.8
   
解:
18-x=32.8÷4 
18-x=8.2 
      18-x+x=8.2+x 
18=8.2+x 
      18-8.2=8.2+x-8.2 
x=9.8