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