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