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