Oefen de erafsommen tot 20
Erafsommen
|
1.
10 – 2 =
4
9
8
3
|
2.
1 – 1 =
5
0
2
4
|
3.
2 – 1 =
6
5
1
3
|
4.
4 – 1 =
4
1
3
5
|
|
5.
17 – 0 =
9
17
19
3
|
6.
5 – 4 =
6
2
1
4
|
7.
19 – 13 =
10
6
7
9
|
8.
20 – 7 =
13
17
14
16
|
|
9.
4 – 1 =
3
4
7
8
|
10.
16 – 0 =
5
21
13
16
|
11.
11 – 4 =
7
2
3
6
|
12.
9 – 5 =
5
4
8
6
|
|
13.
13 – 5 =
8
7
12
1
|
14.
10 – 9 =
5
2
1
4
|
15.
9 – 6 =
1
7
3
6
|
16.
3 – 3 =
3
0
4
1
|
|
17.
6 – 5 =
1
4
5
6
|
18.
9 – 1 =
10
8
4
3
|
19.
20 – 19 =
5
6
2
1
|
20.
8 – 0 =
8
5
11
4
|