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