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