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