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