Oefen de erafsommen tot 20
Erafsommen
|
1.
5 – 0 =
5
10
6
8
|
2.
19 – 3 =
16
2
21
1
|
3.
4 – 1 =
7
3
1
5
|
4.
10 – 5 =
5
6
10
9
|
|
5.
12 – 9 =
4
3
6
2
|
6.
2 – 0 =
4
2
6
1
|
7.
20 – 13 =
3
6
7
4
|
8.
18 – 1 =
14
17
15
1
|
|
9.
19 – 3 =
16
10
9
18
|
10.
9 – 4 =
5
3
9
4
|
11.
1 – 0 =
1
3
6
2
|
12.
3 – 3 =
2
5
0
1
|
|
13.
7 – 3 =
5
9
4
6
|
14.
19 – 1 =
18
9
13
15
|
15.
18 – 15 =
2
8
4
3
|
16.
15 – 9 =
8
6
2
7
|
|
17.
4 – 1 =
5
3
7
4
|
18.
11 – 7 =
2
5
7
4
|
19.
2 – 2 =
0
4
5
1
|
20.
2 – 0 =
7
2
3
4
|