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