Oefen de erafsommen tot 20
Erafsommen
|
1.
12 – 2 =
13
5
3
10
|
2.
11 – 0 =
2
13
9
11
|
3.
5 – 0 =
5
8
9
6
|
4.
19 – 3 =
14
12
17
16
|
|
5.
8 – 6 =
2
3
6
7
|
6.
16 – 4 =
14
17
12
9
|
7.
18 – 2 =
2
16
11
20
|
8.
12 – 6 =
6
1
5
3
|
|
9.
11 – 0 =
10
11
13
4
|
10.
17 – 10 =
2
12
3
7
|
11.
14 – 9 =
1
5
3
2
|
12.
10 – 10 =
0
4
1
3
|
|
13.
20 – 18 =
2
1
6
3
|
14.
13 – 6 =
11
7
6
9
|
15.
3 – 2 =
6
1
5
3
|
16.
19 – 1 =
22
18
15
12
|
|
17.
11 – 7 =
6
4
2
9
|
18.
16 – 13 =
2
1
8
3
|
19.
9 – 1 =
9
8
1
13
|
20.
4 – 1 =
4
2
5
3
|