题目内容

1
6
+
5
6
=
3
10
+
2
10
=
17
25
-
7
25
=
2
9
+
5
9
+
8
9
=		 1-
3
8
-
1
8
=
2
13
+
8
13
-
7
13
=
分析：根据同分母分数加减法的计算方法进行计算即可．
解答：解：
1
6
+
5
6
=1，
3
10
+
2
10
=
1
2
，
17
25
-
7
25
=
2
5
，
2
9
+
5
9
+
8
9
=
5
3
，		 1-
3
8
-
1
8
=
1
2
，
2
13
+
8
13
-
7
13
=
3
13
．
点评：同分母分数相加减，分母不变，只把分子相加减．
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相关题目
计算下列各题，得数化成最简分数．
5
11
+
6
11
=
1
5
+
1
7
=
3
4
-
1
6
=
5
8
+
3
8
-
4
8
=
1
6
+
5
6
=
3
10
+
2
10
=
17
25
-
7
25
=		 1-
3
8
-
1
8
=
计算下面各题．
1
4
+
2
4
=
2
5
+
2
5
=
1
6
+
4
6
=
3
10
+
4
10
=
4
7
+
1
7
=
5
12
+
6
12
=
5
9
+
4
9
=
1
6
+
5
6
=
3
10
+
7
10
=
口算
1
4
×
1
3
=
4
7
÷2=
1
2
÷
1
2
=		 10÷
5
6
=
2
3
×
3
4
=
9
10
÷
1
5
=
1
6
÷6=
8
9
÷4=		 15×
4
5
=		 15÷
1
3
=
3
4
×
2
9
=
2
3
÷
1
2
=
2
5
×
1
2
=
1
2
÷
1
4
=
1
2
×
1
4
=
4
5
÷
1
5
=
3
7
×14=
1
4
÷
1
2
=
1
2
-
1
4
=
4
9
×
3
4
=
5
8
×
2
5
=
1
6
÷
2
3
=
1
2
+
1
4
=
3
5
÷1=
7
15
×5=		 1÷
3
4
=
1
2
÷
1
4
=		 1÷
3
5
=
3
4
×12=
1
5
÷
2
3
=
7
9
×
3
7
=		 1-
3
5
=		 18×
5
6
=		 7÷
7
5
=
1
3
+
1
6
=		 1+
3
5
=
2
9
×
1
4
=
8
3
÷2=
3
5
÷
2
5
=
5
9
÷3=
5
6
×
3
10
=
2
5
÷
1
2
=
8×
1
4
=		 9÷
3
4
=		 30×
1
3
=
4
5
÷2=
5
24
÷
5
6
=
5
8
×
1
2
×0=
1
3
×
3
11
=		 8÷
1
4
=
9
10
÷
3
5
=		 0÷
1
3
÷
1
2
=		 1×
9
11
=
2
5
÷
1
5
=
1
3
÷
1
3
=		 0×
2
9
÷
1
2
=
5
6
×
6
5
=
1
5
÷
1
3
=		 0÷
5
12
=		 1×
1
2
÷
1
2
=
直接写出得数．
1
6
+
1
4
=
2
3
÷
1
6
=
5
6
×
3
10
=
3
4
-
1
5
=
2.1×0.3= 3.6-1.24= 6÷15%= 0.5×3=

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