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