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