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