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