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