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