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