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