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