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