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