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