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