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