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