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