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