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