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