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