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