Klapptest: Brüche addieren

1)
2
3
+
8
15
=
10
15
+
8
15
=
6
5
2)
3
4
+
7
8
=
6
8
+
7
8
=
13
8
3)
3
5
+
6
11
=
33
55
+
30
55
=
63
55
4)
3
4
+
3
2
=
3
4
+
6
4
=
9
4
5)
5
8
+
1
3
=
15
24
+
8
24
=
23
24
6)
8
3
+
3
11
=
88
33
+
9
33
=
97
33
7)
3
11
+
9
2
=
6
22
+
99
22
=
105
22
8)
6
11
+
2
3
=
18
33
+
22
33
=
40
33
9)
1
3
+
9
5
=
5
15
+
27
15
=
32
15
10)
7
8
+
2
5
=
35
40
+
16
40
=
51
40
11)
3
4
+
6
5
=
15
20
+
24
20
=
39
20
12)
9
10
+
1
2
=
9
10
+
5
10
=
7
5
13)
1
2
+
6
7
=
7
14
+
12
14
=
19
14
14)
7
12
+
3
5
=
35
60
+
36
60
=
71
60
15)
1
3
+
8
9
=
3
9
+
8
9
=
11
9
16)
3
2
+
1
4
=
6
4
+
1
4
=
7
4
17)
7
12
+
1
7
=
49
84
+
12
84
=
61
84
18)
1
5
+
9
13
=
13
65
+
45
65
=
58
65