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