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