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