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