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