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