Aftrekken
12
-
7
=
____________________
15
-
8
=
____________________
12
-
4
=
____________________
15
-
9
=
____________________
19
-
7
=
____________________
16
-
____________________
=
6
15
-
____________________
=
9
13
-
____________________
=
9
4
=
10
-
____________________
17
-
____________________
=
6
