Oefen de erafsommen tot 20
Erafsommen
|
1.
3 – 2 =
5
4
6
1
|
2.
15 – 2 =
7
1
13
17
|
3.
12 – 8 =
2
4
3
9
|
4.
7 – 4 =
8
3
4
2
|
|
5.
12 – 9 =
5
3
2
8
|
6.
10 – 4 =
9
2
8
6
|
7.
13 – 4 =
10
13
9
14
|
8.
6 – 6 =
2
1
0
4
|
|
9.
9 – 7 =
4
5
2
3
|
10.
2 – 1 =
2
4
5
1
|
11.
3 – 0 =
5
2
6
3
|
12.
14 – 10 =
4
5
7
3
|
|
13.
3 – 0 =
5
3
4
8
|
14.
9 – 6 =
6
1
5
3
|
15.
20 – 0 =
11
19
20
21
|
16.
3 – 3 =
1
3
2
0
|
|
17.
10 – 3 =
2
3
7
4
|
18.
2 – 1 =
4
1
3
2
|
19.
4 – 3 =
1
4
5
3
|
20.
1 – 1 =
1
0
4
2
|