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