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