Klapptest: Brüche addieren

1)
2
7
+
3
2
=
4
14
+
21
14
=
25
14
2)
2
3
+
7
8
=
16
24
+
21
24
=
37
24
3)
5
6
+
5
7
=
35
42
+
30
42
=
65
42
4)
1
2
+
5
6
=
3
6
+
5
6
=
4
3
5)
4
9
+
9
2
=
8
18
+
81
18
=
89
18
6)
3
2
+
1
3
=
9
6
+
2
6
=
11
6
7)
1
3
+
3
14
=
14
42
+
9
42
=
23
42
8)
7
10
+ 2 =
7
10
+ 2 =
27
10
9)
2
3
+
1
5
=
10
15
+
3
15
=
13
15
10)
9
4
+
1
2
=
9
4
+
2
4
=
11
4
11)
2
3
+
1
2
=
4
6
+
3
6
=
7
6
12)
7
5
+
1
4
=
28
20
+
5
20
=
33
20
13)
5
4
+
8
5
=
25
20
+
32
20
=
57
20
14)
7
4
+
9
13
=
91
52
+
36
52
=
127
52
15)
3
2
+
5
8
=
12
8
+
5
8
=
17
8
16)
3
5
+
1
4
=
12
20
+
5
20
=
17
20
17)
1
7
+
3
13
=
13
91
+
21
91
=
34
91
18)
1
2
+
8
9
=
9
18
+
16
18
=
25
18