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