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