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