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