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