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