精英家教网 > 小学数学 > 题目详情
1
4
+
1
3
=
4
5
-
2
4
=
1
20
+
1
10
=
5
10
-
1
2
=
3
4
+
4
5
=
7
8
-
4
7
=
1
2
+
1
3
=
1
6
+
1
7
=
1-
1
12
=
分析:通过观察,这几道题目,都属于异分母分数的加减法计算,可运用通分的方法进行计算.
解答:解:
1
4
+
1
3
=
1
12
4
5
-
2
4
=
3
10
1
20
+
1
10
=
3
20
5
10
-
1
2
=0
3
4
+
4
5
=
31
20
7
8
-
4
7
=
17
56
1
2
+
1
3
=
5
6
1
6
+
1
7
=
13
42
1-
1
12
=
11
12
点评:对于异分母分数的计算,通过通分,解决问题.
练习册系列答案
相关习题

科目:小学数学 来源: 题型:

1
2
×
2
5
=
1
5
1
5
5
7
÷
2
7
=
5
2
5
2
1
2
÷
1
4
=
2,
2,
1
3
=
9,
9,
10÷
1
8
×8=
640,
640,
5
14
×7=
5
2
5
2
3
5
+
2
5
=
1,
1,
100×
7
20
=
35,
35,
3
16
=
3
2
3
2
3
8
÷
3
8
×
5
6
=
5
6
5
6
1
4
+
1
3
=
7
12
7
12
1
4
=
0,
0,
2
9
=
2
9
2
9
7
12
÷
7
12
=
1,
1,
1
4
÷4×
1
4
=
1
16
1
16
5
6
×36=
30,
30,
3
10
=
10,
10,
10÷
5
9
=
18,
18,
6
5
÷
3
5
=
2,
2,
5
9
×
3
5
×3=
1,
1,
2
7
×14=
4,
4,
2
9
×
3
5
=
2
15
2
15
1
2
×3=
3
2
3
2
6
11
×
11
6
=
1,
1,
9×(2+
5
9
)=
23,
23,
70÷
7
10
=
100,
100,
19×
1
38
=
1
2
1
2
4
5
÷8%=
10,
10,
7
8
=
8
7
8
7
3
4
×
3
8
=
0
0

查看答案和解析>>

科目:小学数学 来源: 题型:

直接写得数
7
8
+
1
2
=
1
4
+
1
3
=
4
5
-
2
3
=
5-
1
4
=
1-
4
5
-
1
5
=
2
3
+
4
5
+
1
3
=

查看答案和解析>>

科目:小学数学 来源: 题型:

直接写出得数.
4x+6x=
10-
3
4
-
1
4
=
1-
2
3
=
1
3
-
1
4
=
7
8
+
1
2
=
1
4
+
1
3
=
4
5
-
2
3
=
x+3x+7x=
7
9
+
4
9
=
1-
1
2
-
1
3
=
3
10
-
1
5
=
2
3
+
1
5
=

查看答案和解析>>

科目:小学数学 来源: 题型:

请你来算一算,能简算的要简算.
11
15
÷[10×(
2
3
+
4
5
)]
3
4
×
8
13
+
5
13
×
3
4
-
3
4
1
4
+
1
6
)÷
1
2
-
2
3
×
1
4
    
 
1
3
×
4
5
÷
2
3
2
3
-
1
2
)÷
5
6
              
1
6
+
7
10
-
4
15
)×30.

查看答案和解析>>

同步练习册答案