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