Oefen de erafsommen tot 20
Erafsommen
|
1.
3 – 0 =
2
5
8
3
|
2.
12 – 12 =
5
0
1
2
|
3.
5 – 1 =
1
4
7
2
|
4.
18 – 8 =
12
14
10
13
|
|
5.
10 – 7 =
3
1
7
5
|
6.
13 – 2 =
11
12
6
14
|
7.
15 – 4 =
15
1
11
3
|
8.
9 – 7 =
6
5
4
2
|
|
9.
1 – 0 =
3
4
2
1
|
10.
4 – 1 =
5
2
3
8
|
11.
18 – 2 =
10
4
21
16
|
12.
13 – 3 =
15
10
12
1
|
|
13.
6 – 2 =
4
8
9
5
|
14.
7 – 5 =
3
4
5
2
|
15.
11 – 4 =
2
1
4
7
|
16.
20 – 17 =
1
3
4
2
|
|
17.
1 – 1 =
0
5
1
2
|
18.
15 – 11 =
5
8
4
6
|
19.
19 – 9 =
8
14
10
3
|
20.
7 – 0 =
5
7
11
3
|