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