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