Klapptest: Brüche addieren

1)
7
8
+
1
3
=
21
24
+
8
24
=
29
24
2)
2
7
+
1
5
=
10
35
+
7
35
=
17
35
3)
7
8
+
4
3
=
21
24
+
32
24
=
53
24
4)
8
7
+
7
15
=
120
105
+
49
105
=
169
105
5)
1
2
+
7
11
=
11
22
+
14
22
=
25
22
6)
4
3
+
3
4
=
16
12
+
9
12
=
25
12
7)
9
2
+
1
5
=
45
10
+
2
10
=
47
10
8)
3
7
+
9
10
=
30
70
+
63
70
=
93
70
9)
5
6
+
3
7
=
35
42
+
18
42
=
53
42
10)
8
3
+
8
13
=
104
39
+
24
39
=
128
39
11)
2
3
+
9
4
=
8
12
+
27
12
=
35
12
12)
5
12
+
3
2
=
5
12
+
18
12
=
23
12
13)
7
8
+
1
6
=
21
24
+
4
24
=
25
24
14)
3
7
+
3
4
=
12
28
+
21
28
=
33
28
15)
2
3
+
5
4
=
8
12
+
15
12
=
23
12
16)
4
3
+
3
5
=
20
15
+
9
15
=
29
15
17)
4
9
+
3
7
=
28
63
+
27
63
=
55
63
18)
5
6
+
3
2
=
5
6
+
9
6
=
7
3