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