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