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