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