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