Oefen de erafsommen tot 20
Erafsommen
|
1.
16 – 3 =
1
12
13
7
|
2.
20 – 3 =
17
5
9
22
|
3.
5 – 5 =
3
5
0
2
|
4.
19 – 3 =
16
3
2
4
|
|
5.
10 – 3 =
7
12
10
11
|
6.
12 – 11 =
2
3
1
6
|
7.
14 – 14 =
0
1
4
3
|
8.
9 – 5 =
9
4
7
2
|
|
9.
6 – 6 =
5
2
4
0
|
10.
1 – 0 =
3
6
1
4
|
11.
17 – 1 =
2
9
16
12
|
12.
13 – 12 =
1
6
4
5
|
|
13.
13 – 9 =
5
4
3
7
|
14.
13 – 5 =
8
1
3
11
|
15.
7 – 3 =
4
3
7
6
|
16.
14 – 3 =
7
11
1
4
|
|
17.
11 – 7 =
4
6
2
5
|
18.
12 – 5 =
1
3
12
7
|
19.
4 – 2 =
2
3
1
6
|
20.
1 – 1 =
0
1
2
4
|