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