Klapptest: Brüche addieren

1)
5
3
+
5
12
=
20
12
+
5
12
=
25
12
2)
2
3
+
4
5
=
10
15
+
12
15
=
22
15
3)
3
5
+
2
11
=
33
55
+
10
55
=
43
55
4)
2
9
+
7
10
=
20
90
+
63
90
=
83
90
5)
3
8
+
1
6
=
9
24
+
4
24
=
13
24
6)
1
4
+
7
8
=
2
8
+
7
8
=
9
8
7)
1
6
+
1
13
=
13
78
+
6
78
=
19
78
8)
3
8
+
2
15
=
45
120
+
16
120
=
61
120
9)
7
6
+
9
2
=
7
6
+
27
6
=
17
3
10)
2
11
+
9
10
=
20
110
+
99
110
=
119
110
11)
5
12
+
9
14
=
35
84
+
54
84
=
89
84
12)
1
9
+
1
11
=
11
99
+
9
99
=
20
99
13)
8
5
+
8
7
=
56
35
+
40
35
=
96
35
14)
1
2
+
5
4
=
2
4
+
5
4
=
7
4
15)
1
2
+
1
15
=
15
30
+
2
30
=
17
30
16)
7
10
+
3
4
=
14
20
+
15
20
=
29
20
17)
5
3
+
6
11
=
55
33
+
18
33
=
73
33
18)
2
3
+
3
2
=
4
6
+
9
6
=
13
6