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