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