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