Klapptest: Brüche addieren

1)
1
4
+
4
5
=
5
20
+
16
20
=
21
20
2)
1
10
+
2
5
=
1
10
+
4
10
=
1
2
3)
1
5
+
1
2
=
2
10
+
5
10
=
7
10
4)
1
12
+
1
2
=
1
12
+
6
12
=
7
12
5)
1
4
+
1
7
=
7
28
+
4
28
=
11
28
6)
7
3
+
1
12
=
28
12
+
1
12
=
29
12
7)
5
2
+
7
11
=
55
22
+
14
22
=
69
22
8)
1
6
+
5
3
=
1
6
+
10
6
=
11
6
9)
3
4
+
9
4
=
3
4
+
9
4
= 3
10)
2
5
+
1
4
=
8
20
+
5
20
=
13
20
11)
1
5
+
3
10
=
2
10
+
3
10
=
1
2
12)
1
6
+
9
13
=
13
78
+
54
78
=
67
78
13)
2
9
+
3
10
=
20
90
+
27
90
=
47
90
14)
2
3
+
2
13
=
26
39
+
6
39
=
32
39
15)
1
4
+
2
15
=
15
60
+
8
60
=
23
60
16)
8
5
+
7
8
=
64
40
+
35
40
=
99
40
17)
1
6
+
5
8
=
4
24
+
15
24
=
19
24
18)
7
12
+
9
5
=
35
60
+
108
60
=
143
60