Klapptest: Brüche addieren

1)
3
2
+
7
12
=
18
12
+
7
12
=
25
12
2)
1
6
+
1
5
=
5
30
+
6
30
=
11
30
3)
9
7
+
4
5
=
45
35
+
28
35
=
73
35
4)
7
3
+
8
3
=
7
3
+
8
3
= 5
5)
8
9
+
1
3
=
8
9
+
3
9
=
11
9
6)
9
2
+
6
5
=
45
10
+
12
10
=
57
10
7)
9
8
+
3
11
=
99
88
+
24
88
=
123
88
8)
3
4
+
1
5
=
15
20
+
4
20
=
19
20
9)
6
5
+
1
3
=
18
15
+
5
15
=
23
15
10)
1
10
+
3
8
=
4
40
+
15
40
=
19
40
11)
2
5
+
3
7
=
14
35
+
15
35
=
29
35
12)
3
2
+
4
11
=
33
22
+
8
22
=
41
22
13)
9
2
+
5
13
=
117
26
+
10
26
=
127
26
14)
5
4
+
7
13
=
65
52
+
28
52
=
93
52
15)
4
3
+
5
3
=
4
3
+
5
3
= 3
16)
3
7
+
3
2
=
6
14
+
21
14
=
27
14
17)
7
9
+
3
14
=
98
126
+
27
126
=
125
126
18)
1
2
+
8
5
=
5
10
+
16
10
=
21
10