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