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