Oefen de erbijsom en erafsom tot 12
In de mix
|
1.
2 – 1 =
1
2
|
2.
1 + 8 =
9
1
|
3.
11 + 1 =
12
1
|
4.
6 – 4 =
2
1
|
|
5.
11 + 1 =
12
1
|
6.
2 + 9 =
11
1
|
7.
7 + 5 =
1
12
|
8.
6 – 0 =
6
1
|
|
9.
6 – 4 =
2
1
|
10.
12 + 0 =
12
1
|
11.
5 – 5 =
2
0
|
12.
5 + 6 =
11
1
|
|
13.
2 – 2 =
2
0
|
14.
5 + 7 =
12
1
|
15.
12 – 4 =
1
8
|
16.
9 – 2 =
7
1
|
|
17.
8 + 1 =
1
9
|
18.
2 + 4 =
1
6
|
19.
4 + 8 =
1
12
|
20.
3 + 3 =
1
6
|