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