Addieren und Subtrahieren von zweistelligen Zahlen

Die Zeit läuft 00:00

61
+
21
=
12
+
42
=
84
+
15
=
70
+
2
=
68
+
8
=
32
+
44
=
24
-
12
=
35
+
1
=
86
+
11
=
35
-
17
=
46
+
3
=
10
-
10
=
35
+
0
=
29
+
13
=
72
-
23
=
58
+
16
=
94
-
57
=
96
-
24
=
65
-
16
=
57
-
17
=
neu starten  
When scrolling, the navigation stays at the top of the page. This is the end of the static navigation demo.