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