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