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