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