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