题目内容

5
8
-
3
8
=
1
2
+
3
2
=
1
3
+
1
6
=
1
5
-
1
10
=
1
2
+
1
3
=
3
4
-
1
2
=		 1-
3
7
=		 2+
1
3
=
分析：根据分数加减法的计算方法进行计算即可得到答案．
解答：解：
5
8
-
3
8
=
1
4
1
2
+
3
2
=2
1
3
+
1
6
=
1
2
1
5
-
1
10
=
1
10
1
2
+
1
3
=
5
6
3
4
-
1
2
=
1
4
 1-
3
7
=
4
7
 2+
1
3
=2
1
3
点评：此题主要考查的是分数加减法的计算方法的应用．
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相关题目
直接写得数
1
3
+
1
2
=
1
5
-
1
6
=		 1÷
3
7
=		 7×
5
28
=
4
9
×3=
5
8
+
3
8
=
1
2
-
1
3
=
2
9
÷
2
9
=
4
7
÷4=		 3÷
1
3
=
4
5
+
1
10
=		 18×
1
3
=
直接写出得数．
1
5
+
2
5
=
5
8
-
3
8
=
1
2
+
1
3
=
1
8
+
3
8
=
5
9
+
1
3
=
1
2
-
1
10
=
8
9
+
1
18
=
7
11
+
4
11
=
5
6
-
2
3
=
1
5
+
2
5
=
5
8
-
3
8
=
1
2
+
1
3
=
3
4
-
1
2
=
1
8
+
3
8
=
5
9
+
1
3
=
1
2
-
1
10
=
3
5
+
1
15
=
8
9
+
1
18
=
7
11
+
4
11
=
5
6
-
2
3
=		 1-
1
4
=
直接写得数
1
5
+
2
5
=
5
8
-
3
8
=
1
2
+
1
3
=
3
5
+
1
15
=
1-
1
4
=
7
11
+
4
11
=
1
2
-
1
10
=
5
9
+
1
3
=

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