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