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