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