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