Oefen de erafsommen tot 20
Erafsommen
|
1.
10 – 0 =
10
14
11
3
|
2.
10 – 5 =
8
5
2
4
|
3.
19 – 12 =
4
10
7
12
|
4.
14 – 10 =
9
1
4
2
|
|
5.
7 – 4 =
4
3
8
5
|
6.
17 – 12 =
3
5
6
7
|
7.
9 – 9 =
1
0
3
2
|
8.
3 – 2 =
3
5
6
1
|
|
9.
8 – 4 =
7
4
9
2
|
10.
4 – 1 =
3
7
5
4
|
11.
1 – 1 =
3
0
2
4
|
12.
4 – 1 =
3
4
7
1
|
|
13.
19 – 2 =
1
17
12
7
|
14.
16 – 5 =
5
16
3
11
|
15.
20 – 5 =
5
15
8
14
|
16.
17 – 17 =
0
1
5
2
|
|
17.
3 – 2 =
1
5
3
4
|
18.
1 – 1 =
0
1
4
5
|
19.
3 – 2 =
4
2
6
1
|
20.
19 – 2 =
22
9
17
2
|