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