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