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