1
3
Χ-
1
4
Χ=
5
6
5
9
Χ×
3
4
=
25
36
4
5
Χ÷2=1
分析:(1)先化簡(jiǎn)方程,再依據(jù)等式的性質(zhì),方程兩邊同時(shí)除以
1
12
求解,
(2)先化簡(jiǎn)方程,再依據(jù)等式的性質(zhì),方程兩邊同時(shí)除以
5
12
求解,
(3)依據(jù)等式的性質(zhì),方程兩邊同時(shí)乘2,再同時(shí)除以
4
5
求解.
解答:解:(1)
1
3
x-
1
4
x=
5
6
,
          
1
12
x=
5
6
,
      
1
12
x÷
1
12
x=
5
6
÷
1
12

              x=10;

(2)
5
9
3
4
=
25
36
,
       
5
12
x=
25
36
,
  
5
12
x÷
5
12
=
25
36
÷
5
12
,
         x=1
2
3
;

(3)
4
5
x÷2=1,
 
4
5
x÷2×2=1×2,
    
4
5
4
5
=2÷
4
5

         x=2.5.
點(diǎn)評(píng):等式的性質(zhì)是解方程的依據(jù),解方程時(shí)注意對(duì)齊等號(hào).
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目:小學(xué)數(shù)學(xué) 來源: 題型:

直接寫出得數(shù)
5-
3
8
=
1
2
-
1
3
=
1
3
-
1
4
=
5
6
+
2
3
=
3
10
+
1
5
=
4
5
-
4
5
=
1
4
+
1
3
=
1
2
-
3
8
=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:

計(jì)算下面各題,能簡(jiǎn)算的要簡(jiǎn)算
4050-6300÷42
04×6.5-2.76    
 175×
3
10
+
7
10
×175

13÷(
1
4
+
5
6
3
4

8
15
×[
5
6
÷(
7
9
-
1
3
)]

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:

1、
1
6
+
1
8
=
1
25
÷
1
100
=
1
3
÷
1
4
=
5
6
÷
1
6
=
4
5
-
3
5
=
1
6
÷
5
6
=
5-
1
6
=
7
20
÷
1
4
=
1
6
+
1
5
=
3
5
×
1
6
=
1
2
×
4
5
=
1
6
×3=
1
2
×
2
5
=
1
4
-
1
5
=
5
8
-
1
4
=
9
10
-
9
20
=
2
3
÷
1
8
=
1
5
+
1
50
=
7
8
-
3
4
=
1
3
-
1
6
=
5
6
×
3
5
=
3
10
×135=
1
3
+
2
5
=
1
5
+
3
2
=
2
3
×
2
5
=
1
10
+
3
5
=
6
7
-
1
5
=
7
8
-
1
6
=
6
25
÷
1
5
=
9
80
-
1
10
=
18×
5
9
=
1
7
÷
1
4
=
1
10
÷
2
15
=
7
60
÷
1
30
=
1
7
÷
5
7
=
1
5
+
1
6
=
2.4×20= 0.12×3= 0.45×2= 3×1.5=
1.2÷0.3= 1÷2= 4.8×100= 4÷0.2=
0.25×8= 0.89÷8.9= 17.8+2.2= 4.2×5=
0.8÷0.2= 5.79÷0.1= 0.35+0.65= 3.4-1.5=
8.9-0.9= 9.2-9.2= 3.6÷0.4= 0.7×11=
15.15÷15= 0.2×0.3= 1.34×4×2.5= 0.9÷4.5=

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:

計(jì)算下面各題,能簡(jiǎn)算的必須簡(jiǎn)算
14.8-6.46-3.54             
3
5
÷6×
10
7

7
9
+
5
6
-
1
4
)×72        
18
23
÷
8
5
+
18
23
×
3
8

1.25×6.9×8               
13÷(
1
4
+
5
6
3
4

查看答案和解析>>

科目:小學(xué)數(shù)學(xué) 來源: 題型:

7
20
×4
=
1
3
-
1
4
=
5
6
+
3
4
=
1
1
3
×
1
4
÷
1
3
=
1.2×
2
3
=
1
1
3
÷0.5
=
6
1
3
-
1
2
=
1
5
÷5+5÷
1
5
=
3÷3
1
3
=
0.9-
1
10
=
0.75+
5
12
=
24×
3
4
×
2
5
=

查看答案和解析>>

同步練習(xí)冊(cè)答案