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