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