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