Klapptest: Brüche addieren

1)
3
11
+
2
13
=
39
143
+
22
143
=
61
143
2)
1
10
+
7
10
=
1
10
+
7
10
=
4
5
3)
7
3
+
6
7
=
49
21
+
18
21
=
67
21
4)
1
6
+
1
2
=
1
6
+
3
6
=
2
3
5)
5
6
+
7
4
=
10
12
+
21
12
=
31
12
6)
1
4
+
8
15
=
15
60
+
32
60
=
47
60
7)
1
9
+
1
11
=
11
99
+
9
99
=
20
99
8)
8
11
+
9
5
=
40
55
+
99
55
=
139
55
9)
1
8
+
3
4
=
1
8
+
6
8
=
7
8
10)
2
5
+
8
3
=
6
15
+
40
15
=
46
15
11)
1
2
+
2
3
=
3
6
+
4
6
=
7
6
12)
9
4
+
4
5
=
45
20
+
16
20
=
61
20
13)
1
2
+
3
5
=
5
10
+
6
10
=
11
10
14)
2
3
+
5
11
=
22
33
+
15
33
=
37
33
15)
4
5
+
7
5
=
4
5
+
7
5
=
11
5
16)
1
3
+
1
7
=
7
21
+
3
21
=
10
21
17)
3
4
+
1
2
=
3
4
+
2
4
=
5
4
18)
3
10
+
1
4
=
6
20
+
5
20
=
11
20