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