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