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