Reken de erafsommen tot 12 uit
Erafsommen
|
1.
1 – 1 =
0
4
|
2.
6 – 0 =
6
7
|
3.
5 – 1 =
4
9
|
4.
1 – 0 =
3
1
|
|
5.
9 – 0 =
9
6
|
6.
2 – 2 =
4
0
|
7.
6 – 6 =
0
2
|
8.
6 – 5 =
5
1
|
|
9.
8 – 1 =
7
11
|
10.
3 – 2 =
5
1
|
11.
1 – 0 =
4
1
|
12.
3 – 3 =
0
5
|
|
13.
6 – 2 =
4
8
|
14.
8 – 4 =
4
1
|
15.
11 – 11 =
0
1
|
16.
7 – 0 =
7
9
|
|
17.
5 – 0 =
5
9
|
18.
8 – 4 =
4
9
|
19.
11 – 1 =
10
8
|
20.
3 – 0 =
2
3
|